17980625

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{2213}}^1$

素因数の和:2246

約数の個数: 20

約数和(自身を含む): 24207876

約数和(自身を除く): 6227251

約数列:

[1, 5, 13, 25, 65, 125, 325, 625, 1625, 2213, 8125, 11065, 28769, 55325, 143845, 276625, 719225, 1383125, 3596125, 17980625]

約数ペア:

[(1, 17980625), (5, 3596125), (13, 1383125), (25, 719225), (65, 276625), (125, 143845), (325, 55325), (625, 28769), (1625, 11065), (2213, 8125)]