217654857

素因数分解:

$3^5\times 7^1\times {\mathrm{199}}^1\times {\mathrm{643}}^1$

素因数の和:864

約数の個数: 48

約数和(自身を含む): 375065600

約数和(自身を除く): 157410743

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 199, 243, 567, 597, 643, 1393, 1701, 1791, 1929, 4179, 4501, 5373, 5787, 12537, 13503, 16119, 17361, 37611, 40509, 48357, 52083, 112833, 121527, 127957, 156249, 338499, 364581, 383871, 895699, 1093743, 1151613, 2687097, 3454839, 8061291, 10364517, 24183873, 31093551, 72551619, 217654857]

約数ペア:

[(1, 217654857), (3, 72551619), (7, 31093551), (9, 24183873), (21, 10364517), (27, 8061291), (63, 3454839), (81, 2687097), (189, 1151613), (199, 1093743), (243, 895699), (567, 383871), (597, 364581), (643, 338499), (1393, 156249), (1701, 127957), (1791, 121527), (1929, 112833), (4179, 52083), (4501, 48357), (5373, 40509), (5787, 37611), (12537, 17361), (13503, 16119)]