21665181

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{1531}}^1$

素因数の和:1676

約数の個数: 16

約数和(自身を含む): 29782080

約数和(自身を除く): 8116899

約数列:

[1, 3, 53, 89, 159, 267, 1531, 4593, 4717, 14151, 81143, 136259, 243429, 408777, 7221727, 21665181]

約数ペア:

[(1, 21665181), (3, 7221727), (53, 408777), (89, 243429), (159, 136259), (267, 81143), (1531, 14151), (4593, 4717)]