28978551

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{2857}}^1$

素因数の和:2900

約数の個数: 36

約数和(自身を含む): 50826672

約数和(自身を除く): 21848121

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 441, 483, 1127, 1449, 2857, 3381, 8571, 10143, 19999, 25713, 59997, 65711, 139993, 179991, 197133, 419979, 459977, 591399, 1259937, 1379931, 3219839, 4139793, 9659517, 28978551]

約数ペア:

[(1, 28978551), (3, 9659517), (7, 4139793), (9, 3219839), (21, 1379931), (23, 1259937), (49, 591399), (63, 459977), (69, 419979), (147, 197133), (161, 179991), (207, 139993), (441, 65711), (483, 59997), (1127, 25713), (1449, 19999), (2857, 10143), (3381, 8571)]