21293150

素因数分解:

$2^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{3907}}^1$

素因数の和:4028

約数の個数: 24

約数和(自身を含む): 39978840

約数和(自身を除く): 18685690

約数列:

[1, 2, 5, 10, 25, 50, 109, 218, 545, 1090, 2725, 3907, 5450, 7814, 19535, 39070, 97675, 195350, 425863, 851726, 2129315, 4258630, 10646575, 21293150]

約数ペア:

[(1, 21293150), (2, 10646575), (5, 4258630), (10, 2129315), (25, 851726), (50, 425863), (109, 195350), (218, 97675), (545, 39070), (1090, 19535), (2725, 7814), (3907, 5450)]