778848020

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{100109}}^1$

素因数の和:100507

約数の個数: 24

約数和(自身を含む): 1639801800

約数和(自身を除く): 860953780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 100109, 200218, 400436, 500545, 1001090, 2002180, 38942401, 77884802, 155769604, 194712005, 389424010, 778848020]

約数ペア:

[(1, 778848020), (2, 389424010), (4, 194712005), (5, 155769604), (10, 77884802), (20, 38942401), (389, 2002180), (778, 1001090), (1556, 500545), (1945, 400436), (3890, 200218), (7780, 100109)]