21523625

素因数分解:

$5^3\times {\mathrm{409}}^1\times {\mathrm{421}}^1$

素因数の和:845

約数の個数: 16

約数和(自身を含む): 26991120

約数和(自身を除く): 5467495

約数列:

[1, 5, 25, 125, 409, 421, 2045, 2105, 10225, 10525, 51125, 52625, 172189, 860945, 4304725, 21523625]

約数ペア:

[(1, 21523625), (5, 4304725), (25, 860945), (125, 172189), (409, 52625), (421, 51125), (2045, 10525), (2105, 10225)]