20490080

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9851}}^1$

素因数の和:9879

約数の個数: 48

約数和(自身を含む): 52136784

約数和(自身を除く): 31646704

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9851, 19702, 39404, 49255, 78808, 98510, 128063, 157616, 197020, 256126, 315232, 394040, 512252, 640315, 788080, 1024504, 1280630, 1576160, 2049008, 2561260, 4098016, 5122520, 10245040, 20490080]

約数ペア:

[(1, 20490080), (2, 10245040), (4, 5122520), (5, 4098016), (8, 2561260), (10, 2049008), (13, 1576160), (16, 1280630), (20, 1024504), (26, 788080), (32, 640315), (40, 512252), (52, 394040), (65, 315232), (80, 256126), (104, 197020), (130, 157616), (160, 128063), (208, 98510), (260, 78808), (416, 49255), (520, 39404), (1040, 19702), (2080, 9851)]