20516990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157823}}^1$

素因数の和:157843

約数の個数: 16

約数和(自身を含む): 39771648

約数和(自身を除く): 19254658

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 157823, 315646, 789115, 1578230, 2051699, 4103398, 10258495, 20516990]

約数ペア:

[(1, 20516990), (2, 10258495), (5, 4103398), (10, 2051699), (13, 1578230), (26, 789115), (65, 315646), (130, 157823)]