21120009

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{1621}}^1$

素因数の和:1768

約数の個数: 16

約数和(自身を含む): 29118144

約数和(自身を除く): 7998135

約数列:

[1, 3, 43, 101, 129, 303, 1621, 4343, 4863, 13029, 69703, 163721, 209109, 491163, 7040003, 21120009]

約数ペア:

[(1, 21120009), (3, 7040003), (43, 491163), (101, 209109), (129, 163721), (303, 69703), (1621, 13029), (4343, 4863)]