20908517

素因数分解:

$7^1\times {\mathrm{131}}^1\times {\mathrm{151}}^2$

素因数の和:440

約数の個数: 12

約数和(自身を含む): 24238368

約数和(自身を除く): 3329851

約数列:

[1, 7, 131, 151, 917, 1057, 19781, 22801, 138467, 159607, 2986931, 20908517]

約数ペア:

[(1, 20908517), (7, 2986931), (131, 159607), (151, 138467), (917, 22801), (1057, 19781)]