87815620

素因数分解:

$2^2\times 5^1\times {\mathrm{4390781}}^1$

素因数の和:4390790

約数の個数: 12

約数和(自身を含む): 184412844

約数和(自身を除く): 96597224

約数列:

[1, 2, 4, 5, 10, 20, 4390781, 8781562, 17563124, 21953905, 43907810, 87815620]

約数ペア:

[(1, 87815620), (2, 43907810), (4, 21953905), (5, 17563124), (10, 8781562), (20, 4390781)]