18975915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{563}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 38009088

約数和(自身を除く): 19033173

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 107, 315, 321, 535, 563, 749, 963, 1605, 1689, 2247, 2815, 3745, 3941, 4815, 5067, 6741, 8445, 11235, 11823, 19705, 25335, 33705, 35469, 59115, 60241, 177345, 180723, 301205, 421687, 542169, 903615, 1265061, 2108435, 2710845, 3795183, 6325305, 18975915]

約数ペア:

[(1, 18975915), (3, 6325305), (5, 3795183), (7, 2710845), (9, 2108435), (15, 1265061), (21, 903615), (35, 542169), (45, 421687), (63, 301205), (105, 180723), (107, 177345), (315, 60241), (321, 59115), (535, 35469), (563, 33705), (749, 25335), (963, 19705), (1605, 11823), (1689, 11235), (2247, 8445), (2815, 6741), (3745, 5067), (3941, 4815)]