639777625

素因数分解:

$5^3\times {\mathrm{811}}^1\times {\mathrm{6311}}^1$

素因数の和:7137

約数の個数: 16

約数和(自身を含む): 799553664

約数和(自身を除く): 159776039

約数列:

[1, 5, 25, 125, 811, 4055, 6311, 20275, 31555, 101375, 157775, 788875, 5118221, 25591105, 127955525, 639777625]

約数ペア:

[(1, 639777625), (5, 127955525), (25, 25591105), (125, 5118221), (811, 788875), (4055, 157775), (6311, 101375), (20275, 31555)]