21680776

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208469}}^1$

素因数の和:208488

約数の個数: 16

約数和(自身を含む): 43778700

約数和(自身を除く): 22097924

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208469, 416938, 833876, 1667752, 2710097, 5420194, 10840388, 21680776]

約数ペア:

[(1, 21680776), (2, 10840388), (4, 5420194), (8, 2710097), (13, 1667752), (26, 833876), (52, 416938), (104, 208469)]