21879291

素因数分解:

$3^1\times 7^1\times {\mathrm{379}}^1\times {\mathrm{2749}}^1$

素因数の和:3138

約数の個数: 16

約数和(自身を含む): 33440000

約数和(自身を除く): 11560709

約数列:

[1, 3, 7, 21, 379, 1137, 2653, 2749, 7959, 8247, 19243, 57729, 1041871, 3125613, 7293097, 21879291]

約数ペア:

[(1, 21879291), (3, 7293097), (7, 3125613), (21, 1041871), (379, 57729), (1137, 19243), (2653, 8247), (2749, 7959)]