20438060

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 44815680

約数和(自身を除く): 24377620

約数列:

[1, 2, 4, 5, 10, 20, 37, 71, 74, 142, 148, 185, 284, 355, 370, 389, 710, 740, 778, 1420, 1556, 1945, 2627, 3890, 5254, 7780, 10508, 13135, 14393, 26270, 27619, 28786, 52540, 55238, 57572, 71965, 110476, 138095, 143930, 276190, 287860, 552380, 1021903, 2043806, 4087612, 5109515, 10219030, 20438060]

約数ペア:

[(1, 20438060), (2, 10219030), (4, 5109515), (5, 4087612), (10, 2043806), (20, 1021903), (37, 552380), (71, 287860), (74, 276190), (142, 143930), (148, 138095), (185, 110476), (284, 71965), (355, 57572), (370, 55238), (389, 52540), (710, 28786), (740, 27619), (778, 26270), (1420, 14393), (1556, 13135), (1945, 10508), (2627, 7780), (3890, 5254)]