31990581

素因数分解:

$3^2\times 7^3\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:311

約数の個数: 48

約数和(自身を含む): 55369600

約数和(自身を除く): 23379019

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 241, 301, 343, 387, 441, 723, 903, 1029, 1687, 2107, 2169, 2709, 3087, 5061, 6321, 10363, 11809, 14749, 15183, 18963, 31089, 35427, 44247, 72541, 82663, 93267, 106281, 132741, 217623, 247989, 507787, 652869, 743967, 1523361, 3554509, 4570083, 10663527, 31990581]

約数ペア:

[(1, 31990581), (3, 10663527), (7, 4570083), (9, 3554509), (21, 1523361), (43, 743967), (49, 652869), (63, 507787), (129, 247989), (147, 217623), (241, 132741), (301, 106281), (343, 93267), (387, 82663), (441, 72541), (723, 44247), (903, 35427), (1029, 31089), (1687, 18963), (2107, 15183), (2169, 14749), (2709, 11809), (3087, 10363), (5061, 6321)]