21095560

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5437}}^1$

素因数の和:5545

約数の個数: 32

約数和(自身を含む): 47963160

約数和(自身を除く): 26867600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5437, 10874, 21748, 27185, 43496, 54370, 108740, 217480, 527389, 1054778, 2109556, 2636945, 4219112, 5273890, 10547780, 21095560]

約数ペア:

[(1, 21095560), (2, 10547780), (4, 5273890), (5, 4219112), (8, 2636945), (10, 2109556), (20, 1054778), (40, 527389), (97, 217480), (194, 108740), (388, 54370), (485, 43496), (776, 27185), (970, 21748), (1940, 10874), (3880, 5437)]