309900025

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{399871}}^1$

素因数の和:399912

約数の個数: 12

約数和(自身を含む): 396673024

約数和(自身を除く): 86772999

約数列:

[1, 5, 25, 31, 155, 775, 399871, 1999355, 9996775, 12396001, 61980005, 309900025]

約数ペア:

[(1, 309900025), (5, 61980005), (25, 12396001), (31, 9996775), (155, 1999355), (775, 399871)]