20490800

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{4657}}^1$

素因数の和:4686

約数の個数: 60

約数和(自身を含む): 53716056

約数和(自身を除く): 33225256

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 200, 220, 275, 400, 440, 550, 880, 1100, 2200, 4400, 4657, 9314, 18628, 23285, 37256, 46570, 51227, 74512, 93140, 102454, 116425, 186280, 204908, 232850, 256135, 372560, 409816, 465700, 512270, 819632, 931400, 1024540, 1280675, 1862800, 2049080, 2561350, 4098160, 5122700, 10245400, 20490800]

約数ペア:

[(1, 20490800), (2, 10245400), (4, 5122700), (5, 4098160), (8, 2561350), (10, 2049080), (11, 1862800), (16, 1280675), (20, 1024540), (22, 931400), (25, 819632), (40, 512270), (44, 465700), (50, 409816), (55, 372560), (80, 256135), (88, 232850), (100, 204908), (110, 186280), (176, 116425), (200, 102454), (220, 93140), (275, 74512), (400, 51227), (440, 46570), (550, 37256), (880, 23285), (1100, 18628), (2200, 9314), (4400, 4657)]