64426640

素因数分解:

$2^4\times 5^1\times {\mathrm{805333}}^1$

素因数の和:805346

約数の個数: 20

約数和(自身を含む): 149792124

約数和(自身を除く): 85365484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 805333, 1610666, 3221332, 4026665, 6442664, 8053330, 12885328, 16106660, 32213320, 64426640]

約数ペア:

[(1, 64426640), (2, 32213320), (4, 16106660), (5, 12885328), (8, 8053330), (10, 6442664), (16, 4026665), (20, 3221332), (40, 1610666), (80, 805333)]