21855490

素因数分解:

$2^1\times 5^1\times {\mathrm{977}}^1\times {\mathrm{2237}}^1$

素因数の和:3221

約数の個数: 16

約数和(自身を含む): 39397752

約数和(自身を除く): 17542262

約数列:

[1, 2, 5, 10, 977, 1954, 2237, 4474, 4885, 9770, 11185, 22370, 2185549, 4371098, 10927745, 21855490]

約数ペア:

[(1, 21855490), (2, 10927745), (5, 4371098), (10, 2185549), (977, 22370), (1954, 11185), (2237, 9770), (4474, 4885)]