21580360

素因数分解:

$2^3\times 5^1\times {\mathrm{539509}}^1$

素因数の和:539520

約数の個数: 16

約数和(自身を含む): 48555900

約数和(自身を除く): 26975540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 539509, 1079018, 2158036, 2697545, 4316072, 5395090, 10790180, 21580360]

約数ペア:

[(1, 21580360), (2, 10790180), (4, 5395090), (5, 4316072), (8, 2697545), (10, 2158036), (20, 1079018), (40, 539509)]