20497880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39419}}^1$

素因数の和:39443

約数の個数: 32

約数和(自身を含む): 49669200

約数和(自身を除く): 29171320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39419, 78838, 157676, 197095, 315352, 394190, 512447, 788380, 1024894, 1576760, 2049788, 2562235, 4099576, 5124470, 10248940, 20497880]

約数ペア:

[(1, 20497880), (2, 10248940), (4, 5124470), (5, 4099576), (8, 2562235), (10, 2049788), (13, 1576760), (20, 1024894), (26, 788380), (40, 512447), (52, 394190), (65, 315352), (104, 197095), (130, 157676), (260, 78838), (520, 39419)]