28375263

素因数分解:

$3^2\times 7^2\times {\mathrm{37}}^2\times {\mathrm{47}}^1$

素因数の和:141

約数の個数: 54

約数和(自身を含む): 50044176

約数和(自身を除く): 21668913

約数列:

[1, 3, 7, 9, 21, 37, 47, 49, 63, 111, 141, 147, 259, 329, 333, 423, 441, 777, 987, 1369, 1739, 1813, 2303, 2331, 2961, 4107, 5217, 5439, 6909, 9583, 12173, 12321, 15651, 16317, 20727, 28749, 36519, 64343, 67081, 85211, 86247, 109557, 193029, 201243, 255633, 450401, 579087, 603729, 766899, 1351203, 3152807, 4053609, 9458421, 28375263]

約数ペア:

[(1, 28375263), (3, 9458421), (7, 4053609), (9, 3152807), (21, 1351203), (37, 766899), (47, 603729), (49, 579087), (63, 450401), (111, 255633), (141, 201243), (147, 193029), (259, 109557), (329, 86247), (333, 85211), (423, 67081), (441, 64343), (777, 36519), (987, 28749), (1369, 20727), (1739, 16317), (1813, 15651), (2303, 12321), (2331, 12173), (2961, 9583), (4107, 6909), (5217, 5439)]