21209788

素因数分解:

$2^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{2729}}^1$

素因数の和:2829

約数の個数: 24

約数和(自身を含む): 38984400

約数和(自身を除く): 17774612

約数列:

[1, 2, 4, 29, 58, 67, 116, 134, 268, 1943, 2729, 3886, 5458, 7772, 10916, 79141, 158282, 182843, 316564, 365686, 731372, 5302447, 10604894, 21209788]

約数ペア:

[(1, 21209788), (2, 10604894), (4, 5302447), (29, 731372), (58, 365686), (67, 316564), (116, 182843), (134, 158282), (268, 79141), (1943, 10916), (2729, 7772), (3886, 5458)]