21420140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153001}}^1$

素因数の和:153017

約数の個数: 24

約数和(自身を含む): 51408672

約数和(自身を除く): 29988532

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153001, 306002, 612004, 765005, 1071007, 1530010, 2142014, 3060020, 4284028, 5355035, 10710070, 21420140]

約数ペア:

[(1, 21420140), (2, 10710070), (4, 5355035), (5, 4284028), (7, 3060020), (10, 2142014), (14, 1530010), (20, 1071007), (28, 765005), (35, 612004), (70, 306002), (140, 153001)]