21987724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{21727}}^1$

素因数の和:21765

約数の個数: 24

約数和(自身を含む): 43803648

約数和(自身を除く): 21815924

約数列:

[1, 2, 4, 11, 22, 23, 44, 46, 92, 253, 506, 1012, 21727, 43454, 86908, 238997, 477994, 499721, 955988, 999442, 1998884, 5496931, 10993862, 21987724]

約数ペア:

[(1, 21987724), (2, 10993862), (4, 5496931), (11, 1998884), (22, 999442), (23, 955988), (44, 499721), (46, 477994), (92, 238997), (253, 86908), (506, 43454), (1012, 21727)]