21108745

素因数分解:

$5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{9887}}^1$

素因数の和:9960

約数の個数: 16

約数和(自身を含む): 29426688

約数和(自身を除く): 8317943

約数列:

[1, 5, 7, 35, 61, 305, 427, 2135, 9887, 49435, 69209, 346045, 603107, 3015535, 4221749, 21108745]

約数ペア:

[(1, 21108745), (5, 4221749), (7, 3015535), (35, 603107), (61, 346045), (305, 69209), (427, 49435), (2135, 9887)]