20811553

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^2$

素因数の和:193

約数の個数: 24

約数和(自身を含む): 26148096

約数和(自身を除く): 5336543

約数列:

[1, 7, 17, 47, 61, 119, 329, 427, 799, 1037, 2867, 3721, 5593, 7259, 20069, 26047, 48739, 63257, 174887, 341173, 442799, 1224209, 2973079, 20811553]

約数ペア:

[(1, 20811553), (7, 2973079), (17, 1224209), (47, 442799), (61, 341173), (119, 174887), (329, 63257), (427, 48739), (799, 26047), (1037, 20069), (2867, 7259), (3721, 5593)]