20612080

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2551}}^1$

素因数の和:2665

約数の個数: 40

約数和(自身を含む): 48416544

約数和(自身を除く): 27804464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2551, 4040, 5102, 8080, 10204, 12755, 20408, 25510, 40816, 51020, 102040, 204080, 257651, 515302, 1030604, 1288255, 2061208, 2576510, 4122416, 5153020, 10306040, 20612080]

約数ペア:

[(1, 20612080), (2, 10306040), (4, 5153020), (5, 4122416), (8, 2576510), (10, 2061208), (16, 1288255), (20, 1030604), (40, 515302), (80, 257651), (101, 204080), (202, 102040), (404, 51020), (505, 40816), (808, 25510), (1010, 20408), (1616, 12755), (2020, 10204), (2551, 8080), (4040, 5102)]