20917978

素因数分解:

$2^1\times {\mathrm{59}}^1\times {\mathrm{269}}^1\times {\mathrm{659}}^1$

素因数の和:989

約数の個数: 16

約数和(自身を含む): 32076000

約数和(自身を除く): 11158022

約数列:

[1, 2, 59, 118, 269, 538, 659, 1318, 15871, 31742, 38881, 77762, 177271, 354542, 10458989, 20917978]

約数ペア:

[(1, 20917978), (2, 10458989), (59, 354542), (118, 177271), (269, 77762), (538, 38881), (659, 31742), (1318, 15871)]