21370881

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{24821}}^1$

素因数の和:24872

約数の個数: 16

約数和(自身を含む): 33360768

約数和(自身を除く): 11989887

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 24821, 74463, 173747, 521241, 1017661, 3052983, 7123627, 21370881]

約数ペア:

[(1, 21370881), (3, 7123627), (7, 3052983), (21, 1017661), (41, 521241), (123, 173747), (287, 74463), (861, 24821)]