18818037

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 33280000

約数和(自身を除く): 14461963

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 79, 133, 171, 199, 237, 399, 553, 597, 711, 1197, 1393, 1501, 1659, 1791, 3781, 4179, 4503, 4977, 10507, 11343, 12537, 13509, 15721, 26467, 31521, 34029, 47163, 79401, 94563, 110047, 141489, 238203, 298699, 330141, 896097, 990423, 2090893, 2688291, 6272679, 18818037]

約数ペア:

[(1, 18818037), (3, 6272679), (7, 2688291), (9, 2090893), (19, 990423), (21, 896097), (57, 330141), (63, 298699), (79, 238203), (133, 141489), (171, 110047), (199, 94563), (237, 79401), (399, 47163), (553, 34029), (597, 31521), (711, 26467), (1197, 15721), (1393, 13509), (1501, 12537), (1659, 11343), (1791, 10507), (3781, 4977), (4179, 4503)]