21440815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{349}}^1\times {\mathrm{1117}}^1$

素因数の和:1482

約数の個数: 16

約数和(自身を含む): 28173600

約数和(自身を除く): 6732785

約数列:

[1, 5, 11, 55, 349, 1117, 1745, 3839, 5585, 12287, 19195, 61435, 389833, 1949165, 4288163, 21440815]

約数ペア:

[(1, 21440815), (5, 4288163), (11, 1949165), (55, 389833), (349, 61435), (1117, 19195), (1745, 12287), (3839, 5585)]