9998260

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 21908880

約数和(自身を除く): 11910620

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 89, 137, 164, 178, 205, 274, 356, 410, 445, 548, 685, 820, 890, 1370, 1780, 2740, 3649, 5617, 7298, 11234, 12193, 14596, 18245, 22468, 24386, 28085, 36490, 48772, 56170, 60965, 72980, 112340, 121930, 243860, 499913, 999826, 1999652, 2499565, 4999130, 9998260]

約数ペア:

[(1, 9998260), (2, 4999130), (4, 2499565), (5, 1999652), (10, 999826), (20, 499913), (41, 243860), (82, 121930), (89, 112340), (137, 72980), (164, 60965), (178, 56170), (205, 48772), (274, 36490), (356, 28085), (410, 24386), (445, 22468), (548, 18245), (685, 14596), (820, 12193), (890, 11234), (1370, 7298), (1780, 5617), (2740, 3649)]