20573680

素因数分解:

$2^4\times 5^1\times {\mathrm{257171}}^1$

素因数の和:257184

約数の個数: 20

約数和(自身を含む): 47833992

約数和(自身を除く): 27260312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257171, 514342, 1028684, 1285855, 2057368, 2571710, 4114736, 5143420, 10286840, 20573680]

約数ペア:

[(1, 20573680), (2, 10286840), (4, 5143420), (5, 4114736), (8, 2571710), (10, 2057368), (16, 1285855), (20, 1028684), (40, 514342), (80, 257171)]