68640080

素因数分解:

$2^4\times 5^1\times {\mathrm{858001}}^1$

素因数の和:858014

約数の個数: 20

約数和(自身を含む): 159588372

約数和(自身を除く): 90948292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 858001, 1716002, 3432004, 4290005, 6864008, 8580010, 13728016, 17160020, 34320040, 68640080]

約数ペア:

[(1, 68640080), (2, 34320040), (4, 17160020), (5, 13728016), (8, 8580010), (10, 6864008), (16, 4290005), (20, 3432004), (40, 1716002), (80, 858001)]