64380440

素因数分解:

$2^3\times 5^1\times {\mathrm{1609511}}^1$

素因数の和:1609522

約数の個数: 16

約数和(自身を含む): 144856080

約数和(自身を除く): 80475640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1609511, 3219022, 6438044, 8047555, 12876088, 16095110, 32190220, 64380440]

約数ペア:

[(1, 64380440), (2, 32190220), (4, 16095110), (5, 12876088), (8, 8047555), (10, 6438044), (20, 3219022), (40, 1609511)]