20001400

素因数分解:

$2^3\times 5^2\times {\mathrm{97}}^1\times {\mathrm{1031}}^1$

素因数の和:1144

約数の個数: 48

約数和(自身を含む): 47028240

約数和(自身を除く): 27026840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 97, 100, 194, 200, 388, 485, 776, 970, 1031, 1940, 2062, 2425, 3880, 4124, 4850, 5155, 8248, 9700, 10310, 19400, 20620, 25775, 41240, 51550, 100007, 103100, 200014, 206200, 400028, 500035, 800056, 1000070, 2000140, 2500175, 4000280, 5000350, 10000700, 20001400]

約数ペア:

[(1, 20001400), (2, 10000700), (4, 5000350), (5, 4000280), (8, 2500175), (10, 2000140), (20, 1000070), (25, 800056), (40, 500035), (50, 400028), (97, 206200), (100, 200014), (194, 103100), (200, 100007), (388, 51550), (485, 41240), (776, 25775), (970, 20620), (1031, 19400), (1940, 10310), (2062, 9700), (2425, 8248), (3880, 5155), (4124, 4850)]