68781940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79979}}^1$

素因数の和:80031

約数の個数: 24

約数和(自身を含む): 147803040

約数和(自身を除く): 79021100

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 79979, 159958, 319916, 399895, 799790, 1599580, 3439097, 6878194, 13756388, 17195485, 34390970, 68781940]

約数ペア:

[(1, 68781940), (2, 34390970), (4, 17195485), (5, 13756388), (10, 6878194), (20, 3439097), (43, 1599580), (86, 799790), (172, 399895), (215, 319916), (430, 159958), (860, 79979)]