21491540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153511}}^1$

素因数の和:153527

約数の個数: 24

約数和(自身を含む): 51580032

約数和(自身を除く): 30088492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153511, 307022, 614044, 767555, 1074577, 1535110, 2149154, 3070220, 4298308, 5372885, 10745770, 21491540]

約数ペア:

[(1, 21491540), (2, 10745770), (4, 5372885), (5, 4298308), (7, 3070220), (10, 2149154), (14, 1535110), (20, 1074577), (28, 767555), (35, 614044), (70, 307022), (140, 153511)]