640663634

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{142433}}^1$

素因数の和:142621

約数の個数: 16

約数和(自身を含む): 1040907672

約数和(自身を除く): 400244038

約数列:

[1, 2, 13, 26, 173, 346, 2249, 4498, 142433, 284866, 1851629, 3703258, 24640909, 49281818, 320331817, 640663634]

約数ペア:

[(1, 640663634), (2, 320331817), (13, 49281818), (26, 24640909), (173, 3703258), (346, 1851629), (2249, 284866), (4498, 142433)]