20971556

素因数分解:

$2^2\times {\mathrm{61}}^2\times {\mathrm{1409}}^1$

素因数の和:1535

約数の個数: 18

約数和(自身を含む): 37338210

約数和(自身を除く): 16366654

約数列:

[1, 2, 4, 61, 122, 244, 1409, 2818, 3721, 5636, 7442, 14884, 85949, 171898, 343796, 5242889, 10485778, 20971556]

約数ペア:

[(1, 20971556), (2, 10485778), (4, 5242889), (61, 343796), (122, 171898), (244, 85949), (1409, 14884), (2818, 7442), (3721, 5636)]