209984257

素因数分解:

$7^4\times {\mathrm{19}}^1\times {\mathrm{4603}}^1$

素因数の和:4650

約数の個数: 20

約数和(自身を含む): 257916080

約数和(自身を除く): 47931823

約数列:

[1, 7, 19, 49, 133, 343, 931, 2401, 4603, 6517, 32221, 45619, 87457, 225547, 612199, 1578829, 4285393, 11051803, 29997751, 209984257]

約数ペア:

[(1, 209984257), (7, 29997751), (19, 11051803), (49, 4285393), (133, 1578829), (343, 612199), (931, 225547), (2401, 87457), (4603, 45619), (6517, 32221)]