21000983960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{604171}}^1$

素因数の和:604272

約数の個数: 64

約数和(自身を含む): 52200460800

約数和(自身を除く): 31199476840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 632, 790, 869, 1580, 1738, 3160, 3476, 4345, 6952, 8690, 17380, 34760, 604171, 1208342, 2416684, 3020855, 4833368, 6041710, 6645881, 12083420, 13291762, 24166840, 26583524, 33229405, 47729509, 53167048, 66458810, 95459018, 132917620, 190918036, 238647545, 265835240, 381836072, 477295090, 525024599, 954590180, 1050049198, 1909180360, 2100098396, 2625122995, 4200196792, 5250245990, 10500491980, 21000983960]

約数ペア:

[(1, 21000983960), (2, 10500491980), (4, 5250245990), (5, 4200196792), (8, 2625122995), (10, 2100098396), (11, 1909180360), (20, 1050049198), (22, 954590180), (40, 525024599), (44, 477295090), (55, 381836072), (79, 265835240), (88, 238647545), (110, 190918036), (158, 132917620), (220, 95459018), (316, 66458810), (395, 53167048), (440, 47729509), (632, 33229405), (790, 26583524), (869, 24166840), (1580, 13291762), (1738, 12083420), (3160, 6645881), (3476, 6041710), (4345, 4833368), (6952, 3020855), (8690, 2416684), (17380, 1208342), (34760, 604171)]