39780209

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{19801}}^1$

素因数の和:19856

約数の個数: 12

約数和(自身を含む): 47405988

約数和(自身を除く): 7625779

約数列:

[1, 7, 41, 49, 287, 2009, 19801, 138607, 811841, 970249, 5682887, 39780209]

約数ペア:

[(1, 39780209), (7, 5682887), (41, 970249), (49, 811841), (287, 138607), (2009, 19801)]