21988688

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{9887}}^1$

素因数の和:10034

約数の個数: 20

約数和(自身を含む): 42913920

約数和(自身を除く): 20925232

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 9887, 19774, 39548, 79096, 158192, 1374293, 2748586, 5497172, 10994344, 21988688]

約数ペア:

[(1, 21988688), (2, 10994344), (4, 5497172), (8, 2748586), (16, 1374293), (139, 158192), (278, 79096), (556, 39548), (1112, 19774), (2224, 9887)]