19807400

素因数分解:

$2^3\times 5^2\times {\mathrm{97}}^1\times {\mathrm{1021}}^1$

素因数の和:1134

約数の個数: 48

約数和(自身を含む): 46572540

約数和(自身を除く): 26765140

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 97, 100, 194, 200, 388, 485, 776, 970, 1021, 1940, 2042, 2425, 3880, 4084, 4850, 5105, 8168, 9700, 10210, 19400, 20420, 25525, 40840, 51050, 99037, 102100, 198074, 204200, 396148, 495185, 792296, 990370, 1980740, 2475925, 3961480, 4951850, 9903700, 19807400]

約数ペア:

[(1, 19807400), (2, 9903700), (4, 4951850), (5, 3961480), (8, 2475925), (10, 1980740), (20, 990370), (25, 792296), (40, 495185), (50, 396148), (97, 204200), (100, 198074), (194, 102100), (200, 99037), (388, 51050), (485, 40840), (776, 25525), (970, 20420), (1021, 19400), (1940, 10210), (2042, 9700), (2425, 8168), (3880, 5105), (4084, 4850)]