19204420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10789}}^1$

素因数の和:10887

約数の個数: 24

約数和(自身を含む): 40786200

約数和(自身を除く): 21581780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10789, 21578, 43156, 53945, 107890, 215780, 960221, 1920442, 3840884, 4801105, 9602210, 19204420]

約数ペア:

[(1, 19204420), (2, 9602210), (4, 4801105), (5, 3840884), (10, 1920442), (20, 960221), (89, 215780), (178, 107890), (356, 53945), (445, 43156), (890, 21578), (1780, 10789)]