21212215

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{1279}}^1$

素因数の和:1422

約数の個数: 16

約数和(自身を含む): 26542080

約数和(自身を除く): 5329865

約数列:

[1, 5, 31, 107, 155, 535, 1279, 3317, 6395, 16585, 39649, 136853, 198245, 684265, 4242443, 21212215]

約数ペア:

[(1, 21212215), (5, 4242443), (31, 684265), (107, 198245), (155, 136853), (535, 39649), (1279, 16585), (3317, 6395)]