20577080

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12547}}^1$

素因数の和:12599

約数の個数: 32

約数和(自身を含む): 47431440

約数和(自身を除く): 26854360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12547, 25094, 50188, 62735, 100376, 125470, 250940, 501880, 514427, 1028854, 2057708, 2572135, 4115416, 5144270, 10288540, 20577080]

約数ペア:

[(1, 20577080), (2, 10288540), (4, 5144270), (5, 4115416), (8, 2572135), (10, 2057708), (20, 1028854), (40, 514427), (41, 501880), (82, 250940), (164, 125470), (205, 100376), (328, 62735), (410, 50188), (820, 25094), (1640, 12547)]