21107890

素因数分解:

$2^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{19727}}^1$

素因数の和:19841

約数の個数: 16

約数和(自身を含む): 38351232

約数和(自身を除く): 17243342

約数列:

[1, 2, 5, 10, 107, 214, 535, 1070, 19727, 39454, 98635, 197270, 2110789, 4221578, 10553945, 21107890]

約数ペア:

[(1, 21107890), (2, 10553945), (5, 4221578), (10, 2110789), (107, 197270), (214, 98635), (535, 39454), (1070, 19727)]