21385428

素因数分解:

$2^2\times 3^1\times {\mathrm{139}}^1\times {\mathrm{12821}}^1$

素因数の和:12967

約数の個数: 24

約数和(自身を含む): 50262240

約数和(自身を除く): 28876812

約数列:

[1, 2, 3, 4, 6, 12, 139, 278, 417, 556, 834, 1668, 12821, 25642, 38463, 51284, 76926, 153852, 1782119, 3564238, 5346357, 7128476, 10692714, 21385428]

約数ペア:

[(1, 21385428), (2, 10692714), (3, 7128476), (4, 5346357), (6, 3564238), (12, 1782119), (139, 153852), (278, 76926), (417, 51284), (556, 38463), (834, 25642), (1668, 12821)]