20717680

素因数分解:

$2^4\times 5^1\times {\mathrm{258971}}^1$

素因数の和:258984

約数の個数: 20

約数和(自身を含む): 48168792

約数和(自身を除く): 27451112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258971, 517942, 1035884, 1294855, 2071768, 2589710, 4143536, 5179420, 10358840, 20717680]

約数ペア:

[(1, 20717680), (2, 10358840), (4, 5179420), (5, 4143536), (8, 2589710), (10, 2071768), (16, 1294855), (20, 1035884), (40, 517942), (80, 258971)]