21120407

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{4649}}^1$

素因数の和:4726

約数の個数: 16

約数和(自身を含む): 26784000

約数和(自身を除く): 5663593

約数列:

[1, 7, 11, 59, 77, 413, 649, 4543, 4649, 32543, 51139, 274291, 357973, 1920037, 3017201, 21120407]

約数ペア:

[(1, 21120407), (7, 3017201), (11, 1920037), (59, 357973), (77, 274291), (413, 51139), (649, 32543), (4543, 4649)]