638204

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{991}}^1$

素因数の和:1025

約数の個数: 24

約数和(自身を含む): 1333248

約数和(自身を除く): 695044

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644, 991, 1982, 3964, 6937, 13874, 22793, 27748, 45586, 91172, 159551, 319102, 638204]

約数ペア:

[(1, 638204), (2, 319102), (4, 159551), (7, 91172), (14, 45586), (23, 27748), (28, 22793), (46, 13874), (92, 6937), (161, 3964), (322, 1982), (644, 991)]