20901489

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{4903}}^1$

素因数の和:4949

約数の個数: 24

約数和(自身を含む): 33543360

約数和(自身を除く): 12641871

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 4903, 14709, 34321, 102963, 142187, 240247, 426561, 720741, 995309, 2985927, 6967163, 20901489]

約数ペア:

[(1, 20901489), (3, 6967163), (7, 2985927), (21, 995309), (29, 720741), (49, 426561), (87, 240247), (147, 142187), (203, 102963), (609, 34321), (1421, 14709), (4263, 4903)]