28000280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{9091}}^1$

素因数の和:9120

約数の個数: 64

約数和(自身を含む): 78554880

約数和(自身を除く): 50554600

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 9091, 18182, 36364, 45455, 63637, 72728, 90910, 100001, 127274, 181820, 200002, 254548, 318185, 363640, 400004, 500005, 509096, 636370, 700007, 800008, 1000010, 1272740, 1400014, 2000020, 2545480, 2800028, 3500035, 4000040, 5600056, 7000070, 14000140, 28000280]

約数ペア:

[(1, 28000280), (2, 14000140), (4, 7000070), (5, 5600056), (7, 4000040), (8, 3500035), (10, 2800028), (11, 2545480), (14, 2000020), (20, 1400014), (22, 1272740), (28, 1000010), (35, 800008), (40, 700007), (44, 636370), (55, 509096), (56, 500005), (70, 400004), (77, 363640), (88, 318185), (110, 254548), (140, 200002), (154, 181820), (220, 127274), (280, 100001), (308, 90910), (385, 72728), (440, 63637), (616, 45455), (770, 36364), (1540, 18182), (3080, 9091)]