639495

素因数分解:

$3^4\times 5^1\times {\mathrm{1579}}^1$

素因数の和:1596

約数の個数: 20

約数和(自身を含む): 1147080

約数和(自身を除く): 507585

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 1579, 4737, 7895, 14211, 23685, 42633, 71055, 127899, 213165, 639495]

約数ペア:

[(1, 639495), (3, 213165), (5, 127899), (9, 71055), (15, 42633), (27, 23685), (45, 14211), (81, 7895), (135, 4737), (405, 1579)]