40389980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{22691}}^1$

素因数の和:22789

約数の個数: 24

約数和(自身を含む): 85775760

約数和(自身を除く): 45385780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 22691, 45382, 90764, 113455, 226910, 453820, 2019499, 4038998, 8077996, 10097495, 20194990, 40389980]

約数ペア:

[(1, 40389980), (2, 20194990), (4, 10097495), (5, 8077996), (10, 4038998), (20, 2019499), (89, 453820), (178, 226910), (356, 113455), (445, 90764), (890, 45382), (1780, 22691)]