20686540088

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{42390451}}^1$

素因数の和:42390518

約数の個数: 16

約数和(自身を含む): 39423120360

約数和(自身を除く): 18736580272

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 42390451, 84780902, 169561804, 339123608, 2585817511, 5171635022, 10343270044, 20686540088]

約数ペア:

[(1, 20686540088), (2, 10343270044), (4, 5171635022), (8, 2585817511), (61, 339123608), (122, 169561804), (244, 84780902), (488, 42390451)]