28720640

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{863}}^1$

素因数の和:899

約数の個数: 80

約数和(自身を含む): 74245248

約数和(自身を除く): 45524608

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 832, 863, 1040, 1280, 1664, 1726, 2080, 2560, 3328, 3452, 4160, 4315, 6656, 6904, 8320, 8630, 11219, 13808, 16640, 17260, 22438, 27616, 33280, 34520, 44876, 55232, 56095, 69040, 89752, 110464, 112190, 138080, 179504, 220928, 224380, 276160, 359008, 441856, 448760, 552320, 718016, 897520, 1104640, 1436032, 1795040, 2209280, 2872064, 3590080, 5744128, 7180160, 14360320, 28720640]

約数ペア:

[(1, 28720640), (2, 14360320), (4, 7180160), (5, 5744128), (8, 3590080), (10, 2872064), (13, 2209280), (16, 1795040), (20, 1436032), (26, 1104640), (32, 897520), (40, 718016), (52, 552320), (64, 448760), (65, 441856), (80, 359008), (104, 276160), (128, 224380), (130, 220928), (160, 179504), (208, 138080), (256, 112190), (260, 110464), (320, 89752), (416, 69040), (512, 56095), (520, 55232), (640, 44876), (832, 34520), (863, 33280), (1040, 27616), (1280, 22438), (1664, 17260), (1726, 16640), (2080, 13808), (2560, 11219), (3328, 8630), (3452, 8320), (4160, 6904), (4315, 6656)]