19912779

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 12585141

約数列:

[1, 3, 9, 19, 23, 57, 61, 69, 83, 171, 183, 207, 249, 437, 549, 747, 1159, 1311, 1403, 1577, 1909, 3477, 3933, 4209, 4731, 5063, 5727, 10431, 12627, 14193, 15189, 17181, 26657, 36271, 45567, 79971, 96197, 108813, 116449, 239913, 288591, 326439, 349347, 865773, 1048041, 2212531, 6637593, 19912779]

約数ペア:

[(1, 19912779), (3, 6637593), (9, 2212531), (19, 1048041), (23, 865773), (57, 349347), (61, 326439), (69, 288591), (83, 239913), (171, 116449), (183, 108813), (207, 96197), (249, 79971), (437, 45567), (549, 36271), (747, 26657), (1159, 17181), (1311, 15189), (1403, 14193), (1577, 12627), (1909, 10431), (3477, 5727), (3933, 5063), (4209, 4731)]