21178311

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5393}}^1$

素因数の和:5431

約数の個数: 32

約数和(自身を含む): 37283328

約数和(自身を除く): 16105017

約数列:

[1, 3, 7, 11, 17, 21, 33, 51, 77, 119, 187, 231, 357, 561, 1309, 3927, 5393, 16179, 37751, 59323, 91681, 113253, 177969, 275043, 415261, 641767, 1008491, 1245783, 1925301, 3025473, 7059437, 21178311]

約数ペア:

[(1, 21178311), (3, 7059437), (7, 3025473), (11, 1925301), (17, 1245783), (21, 1008491), (33, 641767), (51, 415261), (77, 275043), (119, 177969), (187, 113253), (231, 91681), (357, 59323), (561, 37751), (1309, 16179), (3927, 5393)]