20502880

素因数分解:

$2^5\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1009}}^1$

素因数の和:1151

約数の個数: 48

約数和(自身を含む): 48867840

約数和(自身を除く): 28364960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1009, 1016, 1270, 2018, 2032, 2540, 4036, 4064, 5045, 5080, 8072, 10090, 10160, 16144, 20180, 20320, 32288, 40360, 80720, 128143, 161440, 256286, 512572, 640715, 1025144, 1281430, 2050288, 2562860, 4100576, 5125720, 10251440, 20502880]

約数ペア:

[(1, 20502880), (2, 10251440), (4, 5125720), (5, 4100576), (8, 2562860), (10, 2050288), (16, 1281430), (20, 1025144), (32, 640715), (40, 512572), (80, 256286), (127, 161440), (160, 128143), (254, 80720), (508, 40360), (635, 32288), (1009, 20320), (1016, 20180), (1270, 16144), (2018, 10160), (2032, 10090), (2540, 8072), (4036, 5080), (4064, 5045)]