20998754

素因数分解:

$2^1\times 7^2\times {\mathrm{47}}^2\times {\mathrm{97}}^1$

素因数の和:207

約数の個数: 36

約数和(自身を含む): 37822806

約数和(自身を除く): 16824052

約数列:

[1, 2, 7, 14, 47, 49, 94, 97, 98, 194, 329, 658, 679, 1358, 2209, 2303, 4418, 4559, 4606, 4753, 9118, 9506, 15463, 30926, 31913, 63826, 108241, 214273, 216482, 223391, 428546, 446782, 1499911, 2999822, 10499377, 20998754]

約数ペア:

[(1, 20998754), (2, 10499377), (7, 2999822), (14, 1499911), (47, 446782), (49, 428546), (94, 223391), (97, 216482), (98, 214273), (194, 108241), (329, 63826), (658, 31913), (679, 30926), (1358, 15463), (2209, 9506), (2303, 9118), (4418, 4753), (4559, 4606)]