21071996

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{5381}}^1$

素因数の和:5485

約数の個数: 24

約数和(自身を含む): 40687920

約数和(自身を除く): 19615924

約数列:

[1, 2, 4, 11, 22, 44, 89, 178, 356, 979, 1958, 3916, 5381, 10762, 21524, 59191, 118382, 236764, 478909, 957818, 1915636, 5267999, 10535998, 21071996]

約数ペア:

[(1, 21071996), (2, 10535998), (4, 5267999), (11, 1915636), (22, 957818), (44, 478909), (89, 236764), (178, 118382), (356, 59191), (979, 21524), (1958, 10762), (3916, 5381)]