21399909

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{9157}}^1$

素因数の和:9220

約数の個数: 16

約数和(自身を含む): 30770880

約数和(自身を除く): 9370971

約数列:

[1, 3, 19, 41, 57, 123, 779, 2337, 9157, 27471, 173983, 375437, 521949, 1126311, 7133303, 21399909]

約数ペア:

[(1, 21399909), (3, 7133303), (19, 1126311), (41, 521949), (57, 375437), (123, 173983), (779, 27471), (2337, 9157)]