21286624720

素因数分解:

$2^4\times 5^1\times {\mathrm{266082809}}^1$

素因数の和:266082822

約数の個数: 20

約数和(自身を含む): 49491402660

約数和(自身を除く): 28204777940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266082809, 532165618, 1064331236, 1330414045, 2128662472, 2660828090, 4257324944, 5321656180, 10643312360, 21286624720]

約数ペア:

[(1, 21286624720), (2, 10643312360), (4, 5321656180), (5, 4257324944), (8, 2660828090), (10, 2128662472), (16, 1330414045), (20, 1064331236), (40, 532165618), (80, 266082809)]