66939640

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{5381}}^1$

素因数の和:5703

約数の個数: 32

約数和(自身を含む): 151126560

約数和(自身を除く): 84186920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 5381, 6220, 10762, 12440, 21524, 26905, 43048, 53810, 107620, 215240, 1673491, 3346982, 6693964, 8367455, 13387928, 16734910, 33469820, 66939640]

約数ペア:

[(1, 66939640), (2, 33469820), (4, 16734910), (5, 13387928), (8, 8367455), (10, 6693964), (20, 3346982), (40, 1673491), (311, 215240), (622, 107620), (1244, 53810), (1555, 43048), (2488, 26905), (3110, 21524), (5381, 12440), (6220, 10762)]