20855863

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{821}}^1$

素因数の和:1038

約数の個数: 16

約数和(自身を含む): 25251840

約数和(自身を除く): 4395977

約数列:

[1, 7, 19, 133, 191, 821, 1337, 3629, 5747, 15599, 25403, 109193, 156811, 1097677, 2979409, 20855863]

約数ペア:

[(1, 20855863), (7, 2979409), (19, 1097677), (133, 156811), (191, 109193), (821, 25403), (1337, 15599), (3629, 5747)]