21916916

素因数分解:

$2^2\times 7^2\times {\mathrm{111821}}^1$

素因数の和:111839

約数の個数: 18

約数和(自身を含む): 44616978

約数和(自身を除く): 22700062

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 111821, 223642, 447284, 782747, 1565494, 3130988, 5479229, 10958458, 21916916]

約数ペア:

[(1, 21916916), (2, 10958458), (4, 5479229), (7, 3130988), (14, 1565494), (28, 782747), (49, 447284), (98, 223642), (196, 111821)]