66821680

素因数分解:

$2^4\times 5^1\times {\mathrm{835271}}^1$

素因数の和:835284

約数の個数: 20

約数和(自身を含む): 155360592

約数和(自身を除く): 88538912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 835271, 1670542, 3341084, 4176355, 6682168, 8352710, 13364336, 16705420, 33410840, 66821680]

約数ペア:

[(1, 66821680), (2, 33410840), (4, 16705420), (5, 13364336), (8, 8352710), (10, 6682168), (16, 4176355), (20, 3341084), (40, 1670542), (80, 835271)]