21066143

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{503}}^1$

素因数の和:734

約数の個数: 16

約数和(自身を含む): 25030656

約数和(自身を除く): 3964513

約数列:

[1, 7, 31, 193, 217, 503, 1351, 3521, 5983, 15593, 41881, 97079, 109151, 679553, 3009449, 21066143]

約数ペア:

[(1, 21066143), (7, 3009449), (31, 679553), (193, 109151), (217, 97079), (503, 41881), (1351, 15593), (3521, 5983)]