18885231

素因数分解:

$3^5\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 30750720

約数和(自身を除く): 11865489

約数列:

[1, 3, 9, 23, 27, 31, 69, 81, 93, 109, 207, 243, 279, 327, 621, 713, 837, 981, 1863, 2139, 2507, 2511, 2943, 3379, 5589, 6417, 7521, 7533, 8829, 10137, 19251, 22563, 26487, 30411, 57753, 67689, 77717, 91233, 173259, 203067, 233151, 273699, 609201, 699453, 821097, 2098359, 6295077, 18885231]

約数ペア:

[(1, 18885231), (3, 6295077), (9, 2098359), (23, 821097), (27, 699453), (31, 609201), (69, 273699), (81, 233151), (93, 203067), (109, 173259), (207, 91233), (243, 77717), (279, 67689), (327, 57753), (621, 30411), (713, 26487), (837, 22563), (981, 19251), (1863, 10137), (2139, 8829), (2507, 7533), (2511, 7521), (2943, 6417), (3379, 5589)]