664780

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{773}}^1$

素因数の和:825

約数の個数: 24

約数和(自身を含む): 1430352

約数和(自身を除く): 765572

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 773, 860, 1546, 3092, 3865, 7730, 15460, 33239, 66478, 132956, 166195, 332390, 664780]

約数ペア:

[(1, 664780), (2, 332390), (4, 166195), (5, 132956), (10, 66478), (20, 33239), (43, 15460), (86, 7730), (172, 3865), (215, 3092), (430, 1546), (773, 860)]