81303640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{2339}}^1$

素因数の和:2440

約数の個数: 64

約数和(自身を含む): 202176000

約数和(自身を除く): 120872360

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, 2339, 3160, 3476, 4345, 4678, 6952, 8690, 9356, 11695, 17380, 18712, 23390, 25729, 34760, 46780, 51458, 93560, 102916, 128645, 184781, 205832, 257290, 369562, 514580, 739124, 923905, 1029160, 1478248, 1847810, 2032591, 3695620, 4065182, 7391240, 8130364, 10162955, 16260728, 20325910, 40651820, 81303640]

約数ペア:

[(1, 81303640), (2, 40651820), (4, 20325910), (5, 16260728), (8, 10162955), (10, 8130364), (11, 7391240), (20, 4065182), (22, 3695620), (40, 2032591), (44, 1847810), (55, 1478248), (79, 1029160), (88, 923905), (110, 739124), (158, 514580), (220, 369562), (316, 257290), (395, 205832), (440, 184781), (632, 128645), (790, 102916), (869, 93560), (1580, 51458), (1738, 46780), (2339, 34760), (3160, 25729), (3476, 23390), (4345, 18712), (4678, 17380), (6952, 11695), (8690, 9356)]