20906480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1009}}^1$

素因数の和:1066

約数の個数: 80

約数和(自身を含む): 57109440

約数和(自身を除く): 36202960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 1009, 1036, 1295, 1480, 2018, 2072, 2590, 2960, 4036, 4144, 5045, 5180, 7063, 8072, 10090, 10360, 14126, 16144, 20180, 20720, 28252, 35315, 37333, 40360, 56504, 70630, 74666, 80720, 113008, 141260, 149332, 186665, 261331, 282520, 298664, 373330, 522662, 565040, 597328, 746660, 1045324, 1306655, 1493320, 2090648, 2613310, 2986640, 4181296, 5226620, 10453240, 20906480]

約数ペア:

[(1, 20906480), (2, 10453240), (4, 5226620), (5, 4181296), (7, 2986640), (8, 2613310), (10, 2090648), (14, 1493320), (16, 1306655), (20, 1045324), (28, 746660), (35, 597328), (37, 565040), (40, 522662), (56, 373330), (70, 298664), (74, 282520), (80, 261331), (112, 186665), (140, 149332), (148, 141260), (185, 113008), (259, 80720), (280, 74666), (296, 70630), (370, 56504), (518, 40360), (560, 37333), (592, 35315), (740, 28252), (1009, 20720), (1036, 20180), (1295, 16144), (1480, 14126), (2018, 10360), (2072, 10090), (2590, 8072), (2960, 7063), (4036, 5180), (4144, 5045)]