21995181

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{14461}}^1$

素因数の和:14493

約数の個数: 18

約数和(自身を含む): 34405098

約数和(自身を除く): 12409917

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 14461, 43383, 130149, 187993, 563979, 1691937, 2443909, 7331727, 21995181]

約数ペア:

[(1, 21995181), (3, 7331727), (9, 2443909), (13, 1691937), (39, 563979), (117, 187993), (169, 130149), (507, 43383), (1521, 14461)]