20291481

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2351}}^1$

素因数の和:2501

約数の個数: 24

約数和(自身を含む): 33755904

約数和(自身を除く): 13464423

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2351, 2877, 7053, 8631, 16457, 21159, 49371, 148113, 322087, 966261, 2254609, 2898783, 6763827, 20291481]

約数ペア:

[(1, 20291481), (3, 6763827), (7, 2898783), (9, 2254609), (21, 966261), (63, 322087), (137, 148113), (411, 49371), (959, 21159), (1233, 16457), (2351, 8631), (2877, 7053)]