21321890

素因数分解:

$2^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{19927}}^1$

素因数の和:20041

約数の個数: 16

約数和(自身を含む): 38740032

約数和(自身を除く): 17418142

約数列:

[1, 2, 5, 10, 107, 214, 535, 1070, 19927, 39854, 99635, 199270, 2132189, 4264378, 10660945, 21321890]

約数ペア:

[(1, 21321890), (2, 10660945), (5, 4264378), (10, 2132189), (107, 199270), (214, 99635), (535, 39854), (1070, 19927)]