18791019

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 12658581

約数列:

[1, 3, 9, 13, 19, 39, 57, 79, 107, 117, 171, 237, 247, 321, 711, 741, 963, 1027, 1391, 1501, 2033, 2223, 3081, 4173, 4503, 6099, 8453, 9243, 12519, 13509, 18297, 19513, 25359, 26429, 58539, 76077, 79287, 109889, 160607, 175617, 237861, 329667, 481821, 989001, 1445463, 2087891, 6263673, 18791019]

約数ペア:

[(1, 18791019), (3, 6263673), (9, 2087891), (13, 1445463), (19, 989001), (39, 481821), (57, 329667), (79, 237861), (107, 175617), (117, 160607), (171, 109889), (237, 79287), (247, 76077), (321, 58539), (711, 26429), (741, 25359), (963, 19513), (1027, 18297), (1391, 13509), (1501, 12519), (2033, 9243), (2223, 8453), (3081, 6099), (4173, 4503)]