21689559

素因数分解:

$3^3\times {\mathrm{113}}^1\times {\mathrm{7109}}^1$

素因数の和:7231

約数の個数: 16

約数和(自身を含む): 32421600

約数和(自身を除く): 10732041

約数列:

[1, 3, 9, 27, 113, 339, 1017, 3051, 7109, 21327, 63981, 191943, 803317, 2409951, 7229853, 21689559]

約数ペア:

[(1, 21689559), (3, 7229853), (9, 2409951), (27, 803317), (113, 191943), (339, 63981), (1017, 21327), (3051, 7109)]