640297

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:168

約数の個数: 16

約数和(自身を含む): 790272

約数和(自身を除く): 149975

約数列:

[1, 7, 23, 41, 97, 161, 287, 679, 943, 2231, 3977, 6601, 15617, 27839, 91471, 640297]

約数ペア:

[(1, 640297), (7, 91471), (23, 27839), (41, 15617), (97, 6601), (161, 3977), (287, 2231), (679, 943)]