19380020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{643}}^1$

素因数の和:800

約数の個数: 48

約数和(自身を含む): 44791488

約数和(自身を除く): 25411468

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 137, 220, 274, 548, 643, 685, 1286, 1370, 1507, 2572, 2740, 3014, 3215, 6028, 6430, 7073, 7535, 12860, 14146, 15070, 28292, 30140, 35365, 70730, 88091, 141460, 176182, 352364, 440455, 880910, 969001, 1761820, 1938002, 3876004, 4845005, 9690010, 19380020]

約数ペア:

[(1, 19380020), (2, 9690010), (4, 4845005), (5, 3876004), (10, 1938002), (11, 1761820), (20, 969001), (22, 880910), (44, 440455), (55, 352364), (110, 176182), (137, 141460), (220, 88091), (274, 70730), (548, 35365), (643, 30140), (685, 28292), (1286, 15070), (1370, 14146), (1507, 12860), (2572, 7535), (2740, 7073), (3014, 6430), (3215, 6028)]