20405739

素因数分解:

$3^1\times {\mathrm{131}}^1\times {\mathrm{137}}^1\times {\mathrm{379}}^1$

素因数の和:650

約数の個数: 16

約数和(自身を含む): 27688320

約数和(自身を除く): 7282581

約数列:

[1, 3, 131, 137, 379, 393, 411, 1137, 17947, 49649, 51923, 53841, 148947, 155769, 6801913, 20405739]

約数ペア:

[(1, 20405739), (3, 6801913), (131, 155769), (137, 148947), (379, 53841), (393, 51923), (411, 49649), (1137, 17947)]