218311145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{108343}}^1$

素因数の和:108392

約数の個数: 16

約数和(自身を含む): 291228672

約数和(自身を除く): 72917527

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 108343, 541715, 1408459, 3358633, 7042295, 16793165, 43662229, 218311145]

約数ペア:

[(1, 218311145), (5, 43662229), (13, 16793165), (31, 7042295), (65, 3358633), (155, 1408459), (403, 541715), (2015, 108343)]