21557368

素因数分解:

$2^3\times 7^1\times {\mathrm{331}}^1\times {\mathrm{1163}}^1$

素因数の和:1507

約数の個数: 32

約数和(自身を含む): 46373760

約数和(自身を除く): 24816392

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 331, 662, 1163, 1324, 2317, 2326, 2648, 4634, 4652, 8141, 9268, 9304, 16282, 18536, 32564, 65128, 384953, 769906, 1539812, 2694671, 3079624, 5389342, 10778684, 21557368]

約数ペア:

[(1, 21557368), (2, 10778684), (4, 5389342), (7, 3079624), (8, 2694671), (14, 1539812), (28, 769906), (56, 384953), (331, 65128), (662, 32564), (1163, 18536), (1324, 16282), (2317, 9304), (2326, 9268), (2648, 8141), (4634, 4652)]