21131971

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{2693}}^1$

素因数の和:2778

約数の個数: 16

約数和(自身を含む): 25862400

約数和(自身を除く): 4730429

約数列:

[1, 7, 19, 59, 133, 413, 1121, 2693, 7847, 18851, 51167, 158887, 358169, 1112209, 3018853, 21131971]

約数ペア:

[(1, 21131971), (7, 3018853), (19, 1112209), (59, 358169), (133, 158887), (413, 51167), (1121, 18851), (2693, 7847)]