21380350

素因数分解:

$2^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{3923}}^1$

素因数の和:4044

約数の個数: 24

約数和(自身を含む): 40142520

約数和(自身を除く): 18762170

約数列:

[1, 2, 5, 10, 25, 50, 109, 218, 545, 1090, 2725, 3923, 5450, 7846, 19615, 39230, 98075, 196150, 427607, 855214, 2138035, 4276070, 10690175, 21380350]

約数ペア:

[(1, 21380350), (2, 10690175), (5, 4276070), (10, 2138035), (25, 855214), (50, 427607), (109, 196150), (218, 98075), (545, 39230), (1090, 19615), (2725, 7846), (3923, 5450)]