18420025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{157}}^1$

素因数の和:218

約数の個数: 36

約数和(自身を含む): 26125932

約数和(自身を除く): 7705907

約数列:

[1, 5, 13, 19, 25, 65, 95, 157, 247, 325, 361, 475, 785, 1235, 1805, 2041, 2983, 3925, 4693, 6175, 9025, 10205, 14915, 23465, 38779, 51025, 56677, 74575, 117325, 193895, 283385, 736801, 969475, 1416925, 3684005, 18420025]

約数ペア:

[(1, 18420025), (5, 3684005), (13, 1416925), (19, 969475), (25, 736801), (65, 283385), (95, 193895), (157, 117325), (247, 74575), (325, 56677), (361, 51025), (475, 38779), (785, 23465), (1235, 14915), (1805, 10205), (2041, 9025), (2983, 6175), (3925, 4693)]