261296721

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{9491}}^1$

素因数の和:9546

約数の個数: 48

約数和(自身を含む): 473840640

約数和(自身を除く): 212543919

約数列:

[1, 3, 7, 9, 19, 21, 23, 57, 63, 69, 133, 161, 171, 207, 399, 437, 483, 1197, 1311, 1449, 3059, 3933, 9177, 9491, 27531, 28473, 66437, 85419, 180329, 199311, 218293, 540987, 597933, 654879, 1262303, 1528051, 1622961, 1964637, 3786909, 4147567, 4584153, 11360727, 12442701, 13752459, 29032969, 37328103, 87098907, 261296721]

約数ペア:

[(1, 261296721), (3, 87098907), (7, 37328103), (9, 29032969), (19, 13752459), (21, 12442701), (23, 11360727), (57, 4584153), (63, 4147567), (69, 3786909), (133, 1964637), (161, 1622961), (171, 1528051), (207, 1262303), (399, 654879), (437, 597933), (483, 540987), (1197, 218293), (1311, 199311), (1449, 180329), (3059, 85419), (3933, 66437), (9177, 28473), (9491, 27531)]