21495860

素因数分解:

$2^2\times 5^1\times {\mathrm{1013}}^1\times {\mathrm{1061}}^1$

素因数の和:2083

約数の個数: 24

約数和(自身を含む): 45228456

約数和(自身を除く): 23732596

約数列:

[1, 2, 4, 5, 10, 20, 1013, 1061, 2026, 2122, 4052, 4244, 5065, 5305, 10130, 10610, 20260, 21220, 1074793, 2149586, 4299172, 5373965, 10747930, 21495860]

約数ペア:

[(1, 21495860), (2, 10747930), (4, 5373965), (5, 4299172), (10, 2149586), (20, 1074793), (1013, 21220), (1061, 20260), (2026, 10610), (2122, 10130), (4052, 5305), (4244, 5065)]