20406680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2351}}^1$

素因数の和:2400

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 33783400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2351, 4340, 4702, 8680, 9404, 11755, 16457, 18808, 23510, 32914, 47020, 65828, 72881, 82285, 94040, 131656, 145762, 164570, 291524, 329140, 364405, 510167, 583048, 658280, 728810, 1020334, 1457620, 2040668, 2550835, 2915240, 4081336, 5101670, 10203340, 20406680]

約数ペア:

[(1, 20406680), (2, 10203340), (4, 5101670), (5, 4081336), (7, 2915240), (8, 2550835), (10, 2040668), (14, 1457620), (20, 1020334), (28, 728810), (31, 658280), (35, 583048), (40, 510167), (56, 364405), (62, 329140), (70, 291524), (124, 164570), (140, 145762), (155, 131656), (217, 94040), (248, 82285), (280, 72881), (310, 65828), (434, 47020), (620, 32914), (868, 23510), (1085, 18808), (1240, 16457), (1736, 11755), (2170, 9404), (2351, 8680), (4340, 4702)]