20968255

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{509}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 31726080

約数和(自身を除く): 10757825

約数列:

[1, 5, 7, 11, 35, 55, 77, 107, 385, 509, 535, 749, 1177, 2545, 3563, 3745, 5599, 5885, 8239, 17815, 27995, 39193, 41195, 54463, 195965, 272315, 381241, 599093, 1906205, 2995465, 4193651, 20968255]

約数ペア:

[(1, 20968255), (5, 4193651), (7, 2995465), (11, 1906205), (35, 599093), (55, 381241), (77, 272315), (107, 195965), (385, 54463), (509, 41195), (535, 39193), (749, 27995), (1177, 17815), (2545, 8239), (3563, 5885), (3745, 5599)]