81720760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{2351}}^1$

素因数の和:2452

約数の個数: 64

約数和(自身を含む): 203212800

約数和(自身を除く): 121492040

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, 2351, 3160, 3476, 4345, 4702, 6952, 8690, 9404, 11755, 17380, 18808, 23510, 25861, 34760, 47020, 51722, 94040, 103444, 129305, 185729, 206888, 258610, 371458, 517220, 742916, 928645, 1034440, 1485832, 1857290, 2043019, 3714580, 4086038, 7429160, 8172076, 10215095, 16344152, 20430190, 40860380, 81720760]

約数ペア:

[(1, 81720760), (2, 40860380), (4, 20430190), (5, 16344152), (8, 10215095), (10, 8172076), (11, 7429160), (20, 4086038), (22, 3714580), (40, 2043019), (44, 1857290), (55, 1485832), (79, 1034440), (88, 928645), (110, 742916), (158, 517220), (220, 371458), (316, 258610), (395, 206888), (440, 185729), (632, 129305), (790, 103444), (869, 94040), (1580, 51722), (1738, 47020), (2351, 34760), (3160, 25861), (3476, 23510), (4345, 18808), (4702, 17380), (6952, 11755), (8690, 9404)]