81470480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1$

素因数の和:102

約数の個数: 240

約数和(自身を含む): 253983744

約数和(自身を除く): 172513264

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 19, 20, 26, 28, 31, 35, 38, 40, 52, 56, 62, 65, 70, 76, 80, 91, 95, 104, 112, 124, 130, 133, 140, 152, 155, 182, 190, 208, 217, 247, 248, 260, 266, 280, 304, 310, 361, 364, 380, 403, 434, 455, 494, 496, 520, 532, 560, 589, 620, 665, 722, 728, 760, 806, 868, 910, 988, 1040, 1064, 1085, 1178, 1235, 1240, 1330, 1444, 1456, 1520, 1612, 1729, 1736, 1805, 1820, 1976, 2015, 2128, 2170, 2356, 2470, 2480, 2527, 2660, 2821, 2888, 2945, 3224, 3458, 3472, 3610, 3640, 3952, 4030, 4123, 4340, 4693, 4712, 4940, 5054, 5320, 5642, 5776, 5890, 6448, 6916, 7220, 7280, 7657, 8060, 8246, 8645, 8680, 9386, 9424, 9880, 10108, 10640, 11191, 11284, 11780, 12635, 13832, 14105, 14440, 15314, 16120, 16492, 17290, 17360, 18772, 19760, 20216, 20615, 22382, 22568, 23465, 23560, 25270, 27664, 28210, 28880, 30628, 32240, 32851, 32984, 34580, 37544, 38285, 40432, 41230, 44764, 45136, 46930, 47120, 50540, 53599, 55955, 56420, 61256, 65702, 65968, 69160, 75088, 76570, 78337, 82460, 89528, 93860, 101080, 107198, 111910, 112840, 122512, 131404, 138320, 145483, 153140, 156674, 164255, 164920, 179056, 187720, 202160, 214396, 223820, 225680, 262808, 267995, 290966, 306280, 313348, 328510, 329840, 375440, 391685, 428792, 447640, 525616, 535990, 581932, 612560, 626696, 657020, 727415, 783370, 857584, 895280, 1018381, 1071980, 1163864, 1253392, 1314040, 1454830, 1566740, 2036762, 2143960, 2327728, 2628080, 2909660, 3133480, 4073524, 4287920, 5091905, 5819320, 6266960, 8147048, 10183810, 11638640, 16294096, 20367620, 40735240, 81470480]

約数ペア:

[(1, 81470480), (2, 40735240), (4, 20367620), (5, 16294096), (7, 11638640), (8, 10183810), (10, 8147048), (13, 6266960), (14, 5819320), (16, 5091905), (19, 4287920), (20, 4073524), (26, 3133480), (28, 2909660), (31, 2628080), (35, 2327728), (38, 2143960), (40, 2036762), (52, 1566740), (56, 1454830), (62, 1314040), (65, 1253392), (70, 1163864), (76, 1071980), (80, 1018381), (91, 895280), (95, 857584), (104, 783370), (112, 727415), (124, 657020), (130, 626696), (133, 612560), (140, 581932), (152, 535990), (155, 525616), (182, 447640), (190, 428792), (208, 391685), (217, 375440), (247, 329840), (248, 328510), (260, 313348), (266, 306280), (280, 290966), (304, 267995), (310, 262808), (361, 225680), (364, 223820), (380, 214396), (403, 202160), (434, 187720), (455, 179056), (494, 164920), (496, 164255), (520, 156674), (532, 153140), (560, 145483), (589, 138320), (620, 131404), (665, 122512), (722, 112840), (728, 111910), (760, 107198), (806, 101080), (868, 93860), (910, 89528), (988, 82460), (1040, 78337), (1064, 76570), (1085, 75088), (1178, 69160), (1235, 65968), (1240, 65702), (1330, 61256), (1444, 56420), (1456, 55955), (1520, 53599), (1612, 50540), (1729, 47120), (1736, 46930), (1805, 45136), (1820, 44764), (1976, 41230), (2015, 40432), (2128, 38285), (2170, 37544), (2356, 34580), (2470, 32984), (2480, 32851), (2527, 32240), (2660, 30628), (2821, 28880), (2888, 28210), (2945, 27664), (3224, 25270), (3458, 23560), (3472, 23465), (3610, 22568), (3640, 22382), (3952, 20615), (4030, 20216), (4123, 19760), (4340, 18772), (4693, 17360), (4712, 17290), (4940, 16492), (5054, 16120), (5320, 15314), (5642, 14440), (5776, 14105), (5890, 13832), (6448, 12635), (6916, 11780), (7220, 11284), (7280, 11191), (7657, 10640), (8060, 10108), (8246, 9880), (8645, 9424), (8680, 9386)]