21740215

素因数分解:

$5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{1549}}^1$

素因数の和:1962

約数の個数: 16

約数和(自身を含む): 29908800

約数和(自身を除く): 8168585

約数列:

[1, 5, 7, 35, 401, 1549, 2005, 2807, 7745, 10843, 14035, 54215, 621149, 3105745, 4348043, 21740215]

約数ペア:

[(1, 21740215), (5, 4348043), (7, 3105745), (35, 621149), (401, 54215), (1549, 14035), (2005, 10843), (2807, 7745)]