640066

素因数分解:

$2^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{349}}^1$

素因数の和:489

約数の個数: 16

約数和(自身を含む): 1108800

約数和(自身を除く): 468734

約数列:

[1, 2, 7, 14, 131, 262, 349, 698, 917, 1834, 2443, 4886, 45719, 91438, 320033, 640066]

約数ペア:

[(1, 640066), (2, 320033), (7, 91438), (14, 45719), (131, 4886), (262, 2443), (349, 1834), (698, 917)]