1990001.00000000

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{26501}}^1$

素因数の和:26533

約数の個数: 40

約数和(自身を含む): 138022416

約数和(自身を除く): 77388128

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 88, 104, 143, 176, 208, 286, 572, 1144, 2288, 26501, 53002, 106004, 212008, 291511, 344513, 424016, 583022, 689026, 1166044, 1378052, 2332088, 2756104, 3789643, 4664176, 5512208, 7579286, 15158572, 30317144, 60634288]

約数ペア:

[(1, 60634288), (2, 30317144), (4, 15158572), (8, 7579286), (11, 5512208), (13, 4664176), (16, 3789643), (22, 2756104), (26, 2332088), (44, 1378052), (52, 1166044), (88, 689026), (104, 583022), (143, 424016), (176, 344513), (208, 291511), (286, 212008), (572, 106004), (1144, 53002), (2288, 26501)]