21296420

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9769}}^1$

素因数の和:9887

約数の個数: 24

約数和(自身を含む): 45137400

約数和(自身を除く): 23840980

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9769, 19538, 39076, 48845, 97690, 195380, 1064821, 2129642, 4259284, 5324105, 10648210, 21296420]

約数ペア:

[(1, 21296420), (2, 10648210), (4, 5324105), (5, 4259284), (10, 2129642), (20, 1064821), (109, 195380), (218, 97690), (436, 48845), (545, 39076), (1090, 19538), (2180, 9769)]