21366261

素因数分解:

$3^6\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:157

約数の個数: 56

約数和(自身を含む): 37774080

約数和(自身を除く): 16407819

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 79, 81, 159, 189, 237, 243, 371, 477, 553, 567, 711, 729, 1113, 1431, 1659, 1701, 2133, 3339, 4187, 4293, 4977, 5103, 6399, 10017, 12561, 12879, 14931, 19197, 29309, 30051, 37683, 38637, 44793, 57591, 87927, 90153, 113049, 134379, 263781, 270459, 339147, 403137, 791343, 1017441, 2374029, 3052323, 7122087, 21366261]

約数ペア:

[(1, 21366261), (3, 7122087), (7, 3052323), (9, 2374029), (21, 1017441), (27, 791343), (53, 403137), (63, 339147), (79, 270459), (81, 263781), (159, 134379), (189, 113049), (237, 90153), (243, 87927), (371, 57591), (477, 44793), (553, 38637), (567, 37683), (711, 30051), (729, 29309), (1113, 19197), (1431, 14931), (1659, 12879), (1701, 12561), (2133, 10017), (3339, 6399), (4187, 5103), (4293, 4977)]