18772209

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:131

約数の個数: 64

約数和(自身を含む): 32102400

約数和(自身を除く): 13330191

約数列:

[1, 3, 9, 19, 23, 27, 37, 43, 57, 69, 111, 129, 171, 207, 333, 387, 437, 513, 621, 703, 817, 851, 989, 999, 1161, 1311, 1591, 2109, 2451, 2553, 2967, 3933, 4773, 6327, 7353, 7659, 8901, 11799, 14319, 16169, 18791, 18981, 22059, 22977, 26703, 30229, 36593, 42957, 48507, 56373, 90687, 109779, 145521, 169119, 272061, 329337, 436563, 507357, 695267, 816183, 988011, 2085801, 6257403, 18772209]

約数ペア:

[(1, 18772209), (3, 6257403), (9, 2085801), (19, 988011), (23, 816183), (27, 695267), (37, 507357), (43, 436563), (57, 329337), (69, 272061), (111, 169119), (129, 145521), (171, 109779), (207, 90687), (333, 56373), (387, 48507), (437, 42957), (513, 36593), (621, 30229), (703, 26703), (817, 22977), (851, 22059), (989, 18981), (999, 18791), (1161, 16169), (1311, 14319), (1591, 11799), (2109, 8901), (2451, 7659), (2553, 7353), (2967, 6327), (3933, 4773)]