21007736

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{173}}^1\times {\mathrm{353}}^1$

素因数の和:575

約数の個数: 32

約数和(自身を含む): 40653360

約数和(自身を除く): 19645624

約数列:

[1, 2, 4, 8, 43, 86, 172, 173, 344, 346, 353, 692, 706, 1384, 1412, 2824, 7439, 14878, 15179, 29756, 30358, 59512, 60716, 61069, 121432, 122138, 244276, 488552, 2625967, 5251934, 10503868, 21007736]

約数ペア:

[(1, 21007736), (2, 10503868), (4, 5251934), (8, 2625967), (43, 488552), (86, 244276), (172, 122138), (173, 121432), (344, 61069), (346, 60716), (353, 59512), (692, 30358), (706, 29756), (1384, 15179), (1412, 14878), (2824, 7439)]