81842481

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:216

約数の個数: 80

約数和(自身を含む): 150543360

約数和(自身を除く): 68700879

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 71, 81, 107, 133, 171, 189, 213, 321, 399, 497, 513, 567, 639, 749, 963, 1197, 1349, 1491, 1539, 1917, 2033, 2247, 2889, 3591, 4047, 4473, 5751, 6099, 6741, 7597, 8667, 9443, 10773, 12141, 13419, 14231, 18297, 20223, 22791, 28329, 36423, 40257, 42693, 53179, 54891, 60669, 68373, 84987, 109269, 128079, 144343, 159537, 164673, 205119, 254961, 384237, 433029, 478611, 615357, 764883, 1010401, 1152711, 1299087, 1435833, 3031203, 3897261, 4307499, 9093609, 11691783, 27280827, 81842481]

約数ペア:

[(1, 81842481), (3, 27280827), (7, 11691783), (9, 9093609), (19, 4307499), (21, 3897261), (27, 3031203), (57, 1435833), (63, 1299087), (71, 1152711), (81, 1010401), (107, 764883), (133, 615357), (171, 478611), (189, 433029), (213, 384237), (321, 254961), (399, 205119), (497, 164673), (513, 159537), (567, 144343), (639, 128079), (749, 109269), (963, 84987), (1197, 68373), (1349, 60669), (1491, 54891), (1539, 53179), (1917, 42693), (2033, 40257), (2247, 36423), (2889, 28329), (3591, 22791), (4047, 20223), (4473, 18297), (5751, 14231), (6099, 13419), (6741, 12141), (7597, 10773), (8667, 9443)]