28872711

素因数分解:

$3^2\times 7^3\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:273

約数の個数: 48

約数和(自身を含む): 49920000

約数和(自身を除く): 21047289

約数列:

[1, 3, 7, 9, 21, 47, 49, 63, 141, 147, 199, 329, 343, 423, 441, 597, 987, 1029, 1393, 1791, 2303, 2961, 3087, 4179, 6909, 9353, 9751, 12537, 16121, 20727, 28059, 29253, 48363, 65471, 68257, 84177, 87759, 145089, 196413, 204771, 458297, 589239, 614313, 1374891, 3208079, 4124673, 9624237, 28872711]

約数ペア:

[(1, 28872711), (3, 9624237), (7, 4124673), (9, 3208079), (21, 1374891), (47, 614313), (49, 589239), (63, 458297), (141, 204771), (147, 196413), (199, 145089), (329, 87759), (343, 84177), (423, 68257), (441, 65471), (597, 48363), (987, 29253), (1029, 28059), (1393, 20727), (1791, 16121), (2303, 12537), (2961, 9751), (3087, 9353), (4179, 6909)]