21778745

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{449}}^1$

素因数の和:652

約数の個数: 16

約数和(自身を含む): 26730000

約数和(自身を除く): 4951255

約数列:

[1, 5, 89, 109, 445, 449, 545, 2245, 9701, 39961, 48505, 48941, 199805, 244705, 4355749, 21778745]

約数ペア:

[(1, 21778745), (5, 4355749), (89, 244705), (109, 199805), (445, 48941), (449, 48505), (545, 39961), (2245, 9701)]