20090980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:138

約数の個数: 144

約数和(自身を含む): 56306880

約数和(自身を除く): 36215900

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 26, 28, 35, 38, 49, 52, 65, 70, 76, 83, 91, 95, 98, 130, 133, 140, 166, 182, 190, 196, 245, 247, 260, 266, 332, 364, 380, 415, 455, 490, 494, 532, 581, 637, 665, 830, 910, 931, 980, 988, 1079, 1162, 1235, 1274, 1330, 1577, 1660, 1729, 1820, 1862, 2158, 2324, 2470, 2548, 2660, 2905, 3154, 3185, 3458, 3724, 4067, 4316, 4655, 4940, 5395, 5810, 6308, 6370, 6916, 7553, 7885, 8134, 8645, 9310, 10790, 11039, 11620, 12103, 12740, 15106, 15770, 16268, 17290, 18620, 20335, 20501, 21580, 22078, 24206, 30212, 31540, 34580, 37765, 40670, 41002, 44156, 48412, 52871, 55195, 60515, 75530, 77273, 81340, 82004, 102505, 105742, 110390, 121030, 143507, 151060, 154546, 205010, 211484, 220780, 242060, 264355, 287014, 309092, 386365, 410020, 528710, 574028, 717535, 772730, 1004549, 1057420, 1435070, 1545460, 2009098, 2870140, 4018196, 5022745, 10045490, 20090980]

約数ペア:

[(1, 20090980), (2, 10045490), (4, 5022745), (5, 4018196), (7, 2870140), (10, 2009098), (13, 1545460), (14, 1435070), (19, 1057420), (20, 1004549), (26, 772730), (28, 717535), (35, 574028), (38, 528710), (49, 410020), (52, 386365), (65, 309092), (70, 287014), (76, 264355), (83, 242060), (91, 220780), (95, 211484), (98, 205010), (130, 154546), (133, 151060), (140, 143507), (166, 121030), (182, 110390), (190, 105742), (196, 102505), (245, 82004), (247, 81340), (260, 77273), (266, 75530), (332, 60515), (364, 55195), (380, 52871), (415, 48412), (455, 44156), (490, 41002), (494, 40670), (532, 37765), (581, 34580), (637, 31540), (665, 30212), (830, 24206), (910, 22078), (931, 21580), (980, 20501), (988, 20335), (1079, 18620), (1162, 17290), (1235, 16268), (1274, 15770), (1330, 15106), (1577, 12740), (1660, 12103), (1729, 11620), (1820, 11039), (1862, 10790), (2158, 9310), (2324, 8645), (2470, 8134), (2548, 7885), (2660, 7553), (2905, 6916), (3154, 6370), (3185, 6308), (3458, 5810), (3724, 5395), (4067, 4940), (4316, 4655)]