20513746

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{571}}^1$

素因数の和:678

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 15069230

約数列:

[1, 2, 11, 22, 23, 46, 71, 142, 253, 506, 571, 781, 1142, 1562, 1633, 3266, 6281, 12562, 13133, 17963, 26266, 35926, 40541, 81082, 144463, 288926, 445951, 891902, 932443, 1864886, 10256873, 20513746]

約数ペア:

[(1, 20513746), (2, 10256873), (11, 1864886), (22, 932443), (23, 891902), (46, 445951), (71, 288926), (142, 144463), (253, 81082), (506, 40541), (571, 35926), (781, 26266), (1142, 17963), (1562, 13133), (1633, 12562), (3266, 6281)]