261390829

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 317813760

約数和(自身を除く): 56422931

約数列:

[1, 7, 37, 47, 109, 197, 259, 329, 763, 1379, 1739, 4033, 5123, 7289, 9259, 12173, 21473, 28231, 35861, 51023, 64813, 150311, 189551, 342583, 794501, 1009231, 1326857, 2398081, 5561507, 7064617, 37341547, 261390829]

約数ペア:

[(1, 261390829), (7, 37341547), (37, 7064617), (47, 5561507), (109, 2398081), (197, 1326857), (259, 1009231), (329, 794501), (763, 342583), (1379, 189551), (1739, 150311), (4033, 64813), (5123, 51023), (7289, 35861), (9259, 28231), (12173, 21473)]