18709243

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:187

約数の個数: 32

約数和(自身を含む): 23869440

約数和(自身を除く): 5160197

約数列:

[1, 7, 19, 41, 47, 73, 133, 287, 329, 511, 779, 893, 1387, 1927, 2993, 3431, 5453, 6251, 9709, 13489, 20951, 24017, 36613, 56867, 65189, 140671, 256291, 398069, 456323, 984697, 2672749, 18709243]

約数ペア:

[(1, 18709243), (7, 2672749), (19, 984697), (41, 456323), (47, 398069), (73, 256291), (133, 140671), (287, 65189), (329, 56867), (511, 36613), (779, 24017), (893, 20951), (1387, 13489), (1927, 9709), (2993, 6251), (3431, 5453)]