638560689

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{547}}^1\times {\mathrm{809}}^1$

素因数の和:1409

約数の個数: 32

約数和(自身を含む): 944576640

約数和(自身を除く): 306015951

約数列:

[1, 3, 13, 37, 39, 111, 481, 547, 809, 1443, 1641, 2427, 7111, 10517, 20239, 21333, 29933, 31551, 60717, 89799, 263107, 389129, 442523, 789321, 1167387, 1327569, 5752799, 16373351, 17258397, 49120053, 212853563, 638560689]

約数ペア:

[(1, 638560689), (3, 212853563), (13, 49120053), (37, 17258397), (39, 16373351), (111, 5752799), (481, 1327569), (547, 1167387), (809, 789321), (1443, 442523), (1641, 389129), (2427, 263107), (7111, 89799), (10517, 60717), (20239, 31551), (21333, 29933)]