20978932

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{439}}^1\times {\mathrm{919}}^1$

素因数の和:1375

約数の個数: 24

約数和(自身を含む): 39670400

約数和(自身を除く): 18691468

約数列:

[1, 2, 4, 13, 26, 52, 439, 878, 919, 1756, 1838, 3676, 5707, 11414, 11947, 22828, 23894, 47788, 403441, 806882, 1613764, 5244733, 10489466, 20978932]

約数ペア:

[(1, 20978932), (2, 10489466), (4, 5244733), (13, 1613764), (26, 806882), (52, 403441), (439, 47788), (878, 23894), (919, 22828), (1756, 11947), (1838, 11414), (3676, 5707)]