39878209

素因数分解:

$7^4\times {\mathrm{17}}^1\times {\mathrm{977}}^1$

素因数の和:1022

約数の個数: 20

約数和(自身を含む): 49308804

約数和(自身を除く): 9430595

約数列:

[1, 7, 17, 49, 119, 343, 833, 977, 2401, 5831, 6839, 16609, 40817, 47873, 116263, 335111, 813841, 2345777, 5696887, 39878209]

約数ペア:

[(1, 39878209), (7, 5696887), (17, 2345777), (49, 813841), (119, 335111), (343, 116263), (833, 47873), (977, 40817), (2401, 16609), (5831, 6839)]