21431709

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20353}}^1$

素因数の和:20378

約数の個数: 20

約数和(自身を含む): 34479676

約数和(自身を除く): 13047967

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20353, 61059, 183177, 264589, 549531, 793767, 1648593, 2381301, 7143903, 21431709]

約数ペア:

[(1, 21431709), (3, 7143903), (9, 2381301), (13, 1648593), (27, 793767), (39, 549531), (81, 264589), (117, 183177), (351, 61059), (1053, 20353)]