640965418

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{121349}}^1$

素因数の和:121509

約数の個数: 16

約数和(自身を含む): 1019340000

約数和(自身を除く): 378374582

約数列:

[1, 2, 19, 38, 139, 278, 2641, 5282, 121349, 242698, 2305631, 4611262, 16867511, 33735022, 320482709, 640965418]

約数ペア:

[(1, 640965418), (2, 320482709), (19, 33735022), (38, 16867511), (139, 4611262), (278, 2305631), (2641, 242698), (5282, 121349)]