20577980

素因数分解:

$2^2\times 5^1\times {\mathrm{691}}^1\times {\mathrm{1489}}^1$

素因数の和:2189

約数の個数: 24

約数和(自身を含む): 43305360

約数和(自身を除く): 22727380

約数列:

[1, 2, 4, 5, 10, 20, 691, 1382, 1489, 2764, 2978, 3455, 5956, 6910, 7445, 13820, 14890, 29780, 1028899, 2057798, 4115596, 5144495, 10288990, 20577980]

約数ペア:

[(1, 20577980), (2, 10288990), (4, 5144495), (5, 4115596), (10, 2057798), (20, 1028899), (691, 29780), (1382, 14890), (1489, 13820), (2764, 7445), (2978, 6910), (3455, 5956)]