18645575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{557}}^1$

素因数の和:683

約数の個数: 24

約数和(自身を含む): 25185888

約数和(自身を除く): 6540313

約数列:

[1, 5, 13, 25, 65, 103, 325, 515, 557, 1339, 2575, 2785, 6695, 7241, 13925, 33475, 36205, 57371, 181025, 286855, 745823, 1434275, 3729115, 18645575]

約数ペア:

[(1, 18645575), (5, 3729115), (13, 1434275), (25, 745823), (65, 286855), (103, 181025), (325, 57371), (515, 36205), (557, 33475), (1339, 13925), (2575, 7241), (2785, 6695)]