21039809

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{113}}^1\times {\mathrm{397}}^1$

素因数の和:584

約数の個数: 16

約数和(自身を含む): 24682368

約数和(自身を除く): 3642559

約数列:

[1, 7, 67, 113, 397, 469, 791, 2779, 7571, 26599, 44861, 52997, 186193, 314027, 3005687, 21039809]

約数ペア:

[(1, 21039809), (7, 3005687), (67, 314027), (113, 186193), (397, 52997), (469, 44861), (791, 26599), (2779, 7571)]