281019921

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:750

約数の個数: 64

約数和(自身を含む): 485388288

約数和(自身を除く): 204368367

約数列:

[1, 3, 7, 13, 21, 37, 39, 43, 91, 111, 129, 259, 273, 301, 481, 559, 647, 777, 903, 1443, 1591, 1677, 1941, 3367, 3913, 4529, 4773, 8411, 10101, 11137, 11739, 13587, 20683, 23939, 25233, 27821, 33411, 58877, 62049, 71817, 83463, 144781, 167573, 176631, 194747, 311207, 361673, 434343, 502719, 584241, 933621, 1029377, 1085019, 2178449, 2531711, 3088131, 6535347, 7205639, 7595133, 13381901, 21616917, 40145703, 93673307, 281019921]

約数ペア:

[(1, 281019921), (3, 93673307), (7, 40145703), (13, 21616917), (21, 13381901), (37, 7595133), (39, 7205639), (43, 6535347), (91, 3088131), (111, 2531711), (129, 2178449), (259, 1085019), (273, 1029377), (301, 933621), (481, 584241), (559, 502719), (647, 434343), (777, 361673), (903, 311207), (1443, 194747), (1591, 176631), (1677, 167573), (1941, 144781), (3367, 83463), (3913, 71817), (4529, 62049), (4773, 58877), (8411, 33411), (10101, 27821), (11137, 25233), (11739, 23939), (13587, 20683)]