20881016

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{200779}}^1$

素因数の和:200798

約数の個数: 16

約数和(自身を含む): 42163800

約数和(自身を除く): 21282784

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 200779, 401558, 803116, 1606232, 2610127, 5220254, 10440508, 20881016]

約数ペア:

[(1, 20881016), (2, 10440508), (4, 5220254), (8, 2610127), (13, 1606232), (26, 803116), (52, 401558), (104, 200779)]