19817091

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 34478080

約数和(自身を除く): 14660989

約数列:

[1, 3, 7, 9, 21, 31, 63, 73, 93, 139, 217, 219, 279, 417, 511, 651, 657, 973, 1251, 1533, 1953, 2263, 2919, 4309, 4599, 6789, 8757, 10147, 12927, 15841, 20367, 30163, 30441, 38781, 47523, 71029, 90489, 91323, 142569, 213087, 271467, 314557, 639261, 943671, 2201899, 2831013, 6605697, 19817091]

約数ペア:

[(1, 19817091), (3, 6605697), (7, 2831013), (9, 2201899), (21, 943671), (31, 639261), (63, 314557), (73, 271467), (93, 213087), (139, 142569), (217, 91323), (219, 90489), (279, 71029), (417, 47523), (511, 38781), (651, 30441), (657, 30163), (973, 20367), (1251, 15841), (1533, 12927), (1953, 10147), (2263, 8757), (2919, 6789), (4309, 4599)]