21268521

素因数分解:

$3^3\times {\mathrm{113}}^1\times {\mathrm{6971}}^1$

素因数の和:7093

約数の個数: 16

約数和(自身を含む): 31792320

約数和(自身を除く): 10523799

約数列:

[1, 3, 9, 27, 113, 339, 1017, 3051, 6971, 20913, 62739, 188217, 787723, 2363169, 7089507, 21268521]

約数ペア:

[(1, 21268521), (3, 7089507), (9, 2363169), (27, 787723), (113, 188217), (339, 62739), (1017, 20913), (3051, 6971)]