21976985

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1997}}^1$

素因数の和:2104

約数の個数: 16

約数和(自身を含む): 27620352

約数和(自身を除く): 5643367

約数列:

[1, 5, 31, 71, 155, 355, 1997, 2201, 9985, 11005, 61907, 141787, 309535, 708935, 4395397, 21976985]

約数ペア:

[(1, 21976985), (5, 4395397), (31, 708935), (71, 309535), (155, 141787), (355, 61907), (1997, 11005), (2201, 9985)]