2640400775

素因数分解:

$5^2\times {\mathrm{251}}^1\times {\mathrm{420781}}^1$

素因数の和:421042

約数の個数: 12

約数和(自身を含む): 3287148984

約数和(自身を除く): 646748209

約数列:

[1, 5, 25, 251, 1255, 6275, 420781, 2103905, 10519525, 105616031, 528080155, 2640400775]

約数ペア:

[(1, 2640400775), (5, 528080155), (25, 105616031), (251, 10519525), (1255, 2103905), (6275, 420781)]