21813625

素因数分解:

$5^3\times {\mathrm{109}}^1\times {\mathrm{1601}}^1$

素因数の和:1725

約数の個数: 16

約数和(自身を含む): 27490320

約数和(自身を除く): 5676695

約数列:

[1, 5, 25, 109, 125, 545, 1601, 2725, 8005, 13625, 40025, 174509, 200125, 872545, 4362725, 21813625]

約数ペア:

[(1, 21813625), (5, 4362725), (25, 872545), (109, 200125), (125, 174509), (545, 40025), (1601, 13625), (2725, 8005)]