21719020

素因数分解:

$2^2\times 5^1\times {\mathrm{631}}^1\times {\mathrm{1721}}^1$

素因数の和:2361

約数の個数: 24

約数和(自身を含む): 45708768

約数和(自身を除く): 23989748

約数列:

[1, 2, 4, 5, 10, 20, 631, 1262, 1721, 2524, 3155, 3442, 6310, 6884, 8605, 12620, 17210, 34420, 1085951, 2171902, 4343804, 5429755, 10859510, 21719020]

約数ペア:

[(1, 21719020), (2, 10859510), (4, 5429755), (5, 4343804), (10, 2171902), (20, 1085951), (631, 34420), (1262, 17210), (1721, 12620), (2524, 8605), (3155, 6884), (3442, 6310)]