21329541

素因数分解:

$3^3\times {\mathrm{113}}^1\times {\mathrm{6991}}^1$

素因数の和:7113

約数の個数: 16

約数和(自身を含む): 31883520

約数和(自身を除く): 10553979

約数列:

[1, 3, 9, 27, 113, 339, 1017, 3051, 6991, 20973, 62919, 188757, 789983, 2369949, 7109847, 21329541]

約数ペア:

[(1, 21329541), (3, 7109847), (9, 2369949), (27, 789983), (113, 188757), (339, 62919), (1017, 20973), (3051, 6991)]