640956

素因数分解:

$2^2\times 3^1\times {\mathrm{31}}^1\times {\mathrm{1723}}^1$

素因数の和:1761

約数の個数: 24

約数和(自身を含む): 1544704

約数和(自身を除く): 903748

約数列:

[1, 2, 3, 4, 6, 12, 31, 62, 93, 124, 186, 372, 1723, 3446, 5169, 6892, 10338, 20676, 53413, 106826, 160239, 213652, 320478, 640956]

約数ペア:

[(1, 640956), (2, 320478), (3, 213652), (4, 160239), (6, 106826), (12, 53413), (31, 20676), (62, 10338), (93, 6892), (124, 5169), (186, 3446), (372, 1723)]