20813680

素因数分解:

$2^4\times 5^1\times {\mathrm{260171}}^1$

素因数の和:260184

約数の個数: 20

約数和(自身を含む): 48391992

約数和(自身を除く): 27578312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260171, 520342, 1040684, 1300855, 2081368, 2601710, 4162736, 5203420, 10406840, 20813680]

約数ペア:

[(1, 20813680), (2, 10406840), (4, 5203420), (5, 4162736), (8, 2601710), (10, 2081368), (16, 1300855), (20, 1040684), (40, 520342), (80, 260171)]