28759905

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 23131935

約数列:

[1, 3, 5, 9, 15, 43, 45, 89, 129, 167, 215, 267, 387, 445, 501, 645, 801, 835, 1335, 1503, 1935, 2505, 3827, 4005, 7181, 7515, 11481, 14863, 19135, 21543, 34443, 35905, 44589, 57405, 64629, 74315, 107715, 133767, 172215, 222945, 323145, 639109, 668835, 1917327, 3195545, 5751981, 9586635, 28759905]

約数ペア:

[(1, 28759905), (3, 9586635), (5, 5751981), (9, 3195545), (15, 1917327), (43, 668835), (45, 639109), (89, 323145), (129, 222945), (167, 172215), (215, 133767), (267, 107715), (387, 74315), (445, 64629), (501, 57405), (645, 44589), (801, 35905), (835, 34443), (1335, 21543), (1503, 19135), (1935, 14863), (2505, 11481), (3827, 7515), (4005, 7181)]