21328575

素因数分解:

$3^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{2609}}^1$

素因数の和:2731

約数の個数: 24

約数和(自身を含む): 35600400

約数和(自身を除く): 14271825

約数列:

[1, 3, 5, 15, 25, 75, 109, 327, 545, 1635, 2609, 2725, 7827, 8175, 13045, 39135, 65225, 195675, 284381, 853143, 1421905, 4265715, 7109525, 21328575]

約数ペア:

[(1, 21328575), (3, 7109525), (5, 4265715), (15, 1421905), (25, 853143), (75, 284381), (109, 195675), (327, 65225), (545, 39135), (1635, 13045), (2609, 8175), (2725, 7827)]