128408575

素因数分解:

$5^2\times {\mathrm{79}}^2\times {\mathrm{823}}^1$

素因数の和:991

約数の個数: 18

約数和(自身を含む): 161463624

約数和(自身を除く): 33055049

約数列:

[1, 5, 25, 79, 395, 823, 1975, 4115, 6241, 20575, 31205, 65017, 156025, 325085, 1625425, 5136343, 25681715, 128408575]

約数ペア:

[(1, 128408575), (5, 25681715), (25, 5136343), (79, 1625425), (395, 325085), (823, 156025), (1975, 65017), (4115, 31205), (6241, 20575)]