20981818

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73363}}^1$

素因数の和:73389

約数の個数: 16

約数和(自身を含む): 36975456

約数和(自身を除く): 15993638

約数列:

[1, 2, 11, 13, 22, 26, 143, 286, 73363, 146726, 806993, 953719, 1613986, 1907438, 10490909, 20981818]

約数ペア:

[(1, 20981818), (2, 10490909), (11, 1907438), (13, 1613986), (22, 953719), (26, 806993), (143, 146726), (286, 73363)]