661307920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{683}}^1$

素因数の和:742

約数の個数: 240

約数和(自身を含む): 2030495040

約数和(自身を除く): 1369187120

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 19, 20, 26, 28, 35, 38, 40, 49, 52, 56, 65, 70, 76, 80, 91, 95, 98, 104, 112, 130, 133, 140, 152, 182, 190, 196, 208, 245, 247, 260, 266, 280, 304, 364, 380, 392, 455, 490, 494, 520, 532, 560, 637, 665, 683, 728, 760, 784, 910, 931, 980, 988, 1040, 1064, 1235, 1274, 1330, 1366, 1456, 1520, 1729, 1820, 1862, 1960, 1976, 2128, 2470, 2548, 2660, 2732, 3185, 3415, 3458, 3640, 3724, 3920, 3952, 4655, 4781, 4940, 5096, 5320, 5464, 6370, 6830, 6916, 7280, 7448, 8645, 8879, 9310, 9562, 9880, 10192, 10640, 10928, 12103, 12740, 12977, 13660, 13832, 14896, 17290, 17758, 18620, 19124, 19760, 23905, 24206, 25480, 25954, 27320, 27664, 33467, 34580, 35516, 37240, 38248, 44395, 47810, 48412, 50960, 51908, 54640, 60515, 62153, 64885, 66934, 69160, 71032, 74480, 76496, 88790, 90839, 95620, 96824, 103816, 121030, 124306, 129770, 133868, 138320, 142064, 167335, 168701, 177580, 181678, 191240, 193648, 207632, 242060, 248612, 259540, 267736, 310765, 334670, 337402, 355160, 363356, 382480, 435071, 454195, 484120, 497224, 519080, 535472, 621530, 635873, 669340, 674804, 710320, 726712, 843505, 870142, 908390, 968240, 994448, 1038160, 1180907, 1243060, 1271746, 1338680, 1349608, 1453424, 1687010, 1740284, 1816780, 2175355, 2361814, 2486120, 2543492, 2677360, 2699216, 3179365, 3374020, 3480568, 3633560, 4350710, 4723628, 4972240, 5086984, 5904535, 6358730, 6748040, 6961136, 7267120, 8266349, 8701420, 9447256, 10173968, 11809070, 12717460, 13496080, 16532698, 17402840, 18894512, 23618140, 25434920, 33065396, 34805680, 41331745, 47236280, 50869840, 66130792, 82663490, 94472560, 132261584, 165326980, 330653960, 661307920]

約数ペア:

[(1, 661307920), (2, 330653960), (4, 165326980), (5, 132261584), (7, 94472560), (8, 82663490), (10, 66130792), (13, 50869840), (14, 47236280), (16, 41331745), (19, 34805680), (20, 33065396), (26, 25434920), (28, 23618140), (35, 18894512), (38, 17402840), (40, 16532698), (49, 13496080), (52, 12717460), (56, 11809070), (65, 10173968), (70, 9447256), (76, 8701420), (80, 8266349), (91, 7267120), (95, 6961136), (98, 6748040), (104, 6358730), (112, 5904535), (130, 5086984), (133, 4972240), (140, 4723628), (152, 4350710), (182, 3633560), (190, 3480568), (196, 3374020), (208, 3179365), (245, 2699216), (247, 2677360), (260, 2543492), (266, 2486120), (280, 2361814), (304, 2175355), (364, 1816780), (380, 1740284), (392, 1687010), (455, 1453424), (490, 1349608), (494, 1338680), (520, 1271746), (532, 1243060), (560, 1180907), (637, 1038160), (665, 994448), (683, 968240), (728, 908390), (760, 870142), (784, 843505), (910, 726712), (931, 710320), (980, 674804), (988, 669340), (1040, 635873), (1064, 621530), (1235, 535472), (1274, 519080), (1330, 497224), (1366, 484120), (1456, 454195), (1520, 435071), (1729, 382480), (1820, 363356), (1862, 355160), (1960, 337402), (1976, 334670), (2128, 310765), (2470, 267736), (2548, 259540), (2660, 248612), (2732, 242060), (3185, 207632), (3415, 193648), (3458, 191240), (3640, 181678), (3724, 177580), (3920, 168701), (3952, 167335), (4655, 142064), (4781, 138320), (4940, 133868), (5096, 129770), (5320, 124306), (5464, 121030), (6370, 103816), (6830, 96824), (6916, 95620), (7280, 90839), (7448, 88790), (8645, 76496), (8879, 74480), (9310, 71032), (9562, 69160), (9880, 66934), (10192, 64885), (10640, 62153), (10928, 60515), (12103, 54640), (12740, 51908), (12977, 50960), (13660, 48412), (13832, 47810), (14896, 44395), (17290, 38248), (17758, 37240), (18620, 35516), (19124, 34580), (19760, 33467), (23905, 27664), (24206, 27320), (25480, 25954)]