18994340

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8713}}^1$

素因数の和:8831

約数の個数: 24

約数和(自身を含む): 40258680

約数和(自身を除く): 21264340

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8713, 17426, 34852, 43565, 87130, 174260, 949717, 1899434, 3798868, 4748585, 9497170, 18994340]

約数ペア:

[(1, 18994340), (2, 9497170), (4, 4748585), (5, 3798868), (10, 1899434), (20, 949717), (109, 174260), (218, 87130), (436, 43565), (545, 34852), (1090, 17426), (2180, 8713)]