20653780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{977}}^1$

素因数の和:1144

約数の個数: 48

約数和(自身を含む): 49948416

約数和(自身を除く): 29294636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 977, 1057, 1510, 1954, 2114, 3020, 3908, 4228, 4885, 5285, 6839, 9770, 10570, 13678, 19540, 21140, 27356, 34195, 68390, 136780, 147527, 295054, 590108, 737635, 1032689, 1475270, 2065378, 2950540, 4130756, 5163445, 10326890, 20653780]

約数ペア:

[(1, 20653780), (2, 10326890), (4, 5163445), (5, 4130756), (7, 2950540), (10, 2065378), (14, 1475270), (20, 1032689), (28, 737635), (35, 590108), (70, 295054), (140, 147527), (151, 136780), (302, 68390), (604, 34195), (755, 27356), (977, 21140), (1057, 19540), (1510, 13678), (1954, 10570), (2114, 9770), (3020, 6839), (3908, 5285), (4228, 4885)]