38909020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{21859}}^1$

素因数の和:21957

約数の個数: 24

約数和(自身を含む): 82630800

約数和(自身を除く): 43721780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 21859, 43718, 87436, 109295, 218590, 437180, 1945451, 3890902, 7781804, 9727255, 19454510, 38909020]

約数ペア:

[(1, 38909020), (2, 19454510), (4, 9727255), (5, 7781804), (10, 3890902), (20, 1945451), (89, 437180), (178, 218590), (356, 109295), (445, 87436), (890, 43718), (1780, 21859)]