28709560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{919}}^1$

素因数の和:1012

約数の個数: 64

約数和(自身を含む): 71539200

約数和(自身を除く): 42829640

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 710, 781, 919, 1420, 1562, 1838, 2840, 3124, 3676, 3905, 4595, 6248, 7352, 7810, 9190, 10109, 15620, 18380, 20218, 31240, 36760, 40436, 50545, 65249, 80872, 101090, 130498, 202180, 260996, 326245, 404360, 521992, 652490, 717739, 1304980, 1435478, 2609960, 2870956, 3588695, 5741912, 7177390, 14354780, 28709560]

約数ペア:

[(1, 28709560), (2, 14354780), (4, 7177390), (5, 5741912), (8, 3588695), (10, 2870956), (11, 2609960), (20, 1435478), (22, 1304980), (40, 717739), (44, 652490), (55, 521992), (71, 404360), (88, 326245), (110, 260996), (142, 202180), (220, 130498), (284, 101090), (355, 80872), (440, 65249), (568, 50545), (710, 40436), (781, 36760), (919, 31240), (1420, 20218), (1562, 18380), (1838, 15620), (2840, 10109), (3124, 9190), (3676, 7810), (3905, 7352), (4595, 6248)]