28259231

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:184

約数の個数: 48

約数和(自身を含む): 40027680

約数和(自身を除く): 11768449

約数列:

[1, 7, 11, 13, 37, 49, 77, 91, 109, 143, 259, 407, 481, 539, 637, 763, 1001, 1199, 1417, 1813, 2849, 3367, 4033, 5291, 5341, 7007, 8393, 9919, 15587, 19943, 23569, 28231, 37037, 44363, 52429, 58751, 69433, 109109, 197617, 259259, 310541, 367003, 576719, 763763, 2173787, 2569021, 4037033, 28259231]

約数ペア:

[(1, 28259231), (7, 4037033), (11, 2569021), (13, 2173787), (37, 763763), (49, 576719), (77, 367003), (91, 310541), (109, 259259), (143, 197617), (259, 109109), (407, 69433), (481, 58751), (539, 52429), (637, 44363), (763, 37037), (1001, 28231), (1199, 23569), (1417, 19943), (1813, 15587), (2849, 9919), (3367, 8393), (4033, 7007), (5291, 5341)]