21141276

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2557}}^1$

素因数の和:2630

約数の個数: 48

約数和(自身を含む): 54147744

約数和(自身を除く): 33006468

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 53, 78, 106, 156, 159, 212, 318, 636, 689, 1378, 2067, 2557, 2756, 4134, 5114, 7671, 8268, 10228, 15342, 30684, 33241, 66482, 99723, 132964, 135521, 199446, 271042, 398892, 406563, 542084, 813126, 1626252, 1761773, 3523546, 5285319, 7047092, 10570638, 21141276]

約数ペア:

[(1, 21141276), (2, 10570638), (3, 7047092), (4, 5285319), (6, 3523546), (12, 1761773), (13, 1626252), (26, 813126), (39, 542084), (52, 406563), (53, 398892), (78, 271042), (106, 199446), (156, 135521), (159, 132964), (212, 99723), (318, 66482), (636, 33241), (689, 30684), (1378, 15342), (2067, 10228), (2557, 8268), (2756, 7671), (4134, 5114)]