21333680

素因数分解:

$2^4\times 5^1\times {\mathrm{266671}}^1$

素因数の和:266684

約数の個数: 20

約数和(自身を含む): 49600992

約数和(自身を除く): 28267312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266671, 533342, 1066684, 1333355, 2133368, 2666710, 4266736, 5333420, 10666840, 21333680]

約数ペア:

[(1, 21333680), (2, 10666840), (4, 5333420), (5, 4266736), (8, 2666710), (10, 2133368), (16, 1333355), (20, 1066684), (40, 533342), (80, 266671)]