638636

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:173

約数の個数: 24

約数和(自身を含む): 1182720

約数和(自身を除く): 544084

約数列:

[1, 2, 4, 43, 47, 79, 86, 94, 158, 172, 188, 316, 2021, 3397, 3713, 4042, 6794, 7426, 8084, 13588, 14852, 159659, 319318, 638636]

約数ペア:

[(1, 638636), (2, 319318), (4, 159659), (43, 14852), (47, 13588), (79, 8084), (86, 7426), (94, 6794), (158, 4042), (172, 3713), (188, 3397), (316, 2021)]