81670211

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{421}}^1$

素因数の和:579

約数の個数: 24

約数和(自身を含む): 98717616

約数和(自身を除く): 17047405

約数列:

[1, 7, 37, 49, 107, 259, 421, 749, 1813, 2947, 3959, 5243, 15577, 20629, 27713, 45047, 109039, 193991, 315329, 763273, 1666739, 2207303, 11667173, 81670211]

約数ペア:

[(1, 81670211), (7, 11667173), (37, 2207303), (49, 1666739), (107, 763273), (259, 315329), (421, 193991), (749, 109039), (1813, 45047), (2947, 27713), (3959, 20629), (5243, 15577)]