20964788

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31013}}^1$

素因数の和:31043

約数の個数: 18

約数和(自身を含む): 39728934

約数和(自身を除く): 18764146

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31013, 62026, 124052, 403169, 806338, 1612676, 5241197, 10482394, 20964788]

約数ペア:

[(1, 20964788), (2, 10482394), (4, 5241197), (13, 1612676), (26, 806338), (52, 403169), (169, 124052), (338, 62026), (676, 31013)]