20533513

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 28046592

約数和(自身を除く): 7513079

約数列:

[1, 7, 11, 13, 73, 77, 91, 143, 281, 511, 803, 949, 1001, 1967, 3091, 3653, 5621, 6643, 10439, 20513, 21637, 25571, 40183, 73073, 143591, 225643, 266669, 281281, 1579501, 1866683, 2933359, 20533513]

約数ペア:

[(1, 20533513), (7, 2933359), (11, 1866683), (13, 1579501), (73, 281281), (77, 266669), (91, 225643), (143, 143591), (281, 73073), (511, 40183), (803, 25571), (949, 21637), (1001, 20513), (1967, 10439), (3091, 6643), (3653, 5621)]