21155116

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{193}}^1\times {\mathrm{409}}^1$

素因数の和:673

約数の個数: 24

約数和(自身を含む): 37861040

約数和(自身を除く): 16705924

約数列:

[1, 2, 4, 67, 134, 193, 268, 386, 409, 772, 818, 1636, 12931, 25862, 27403, 51724, 54806, 78937, 109612, 157874, 315748, 5288779, 10577558, 21155116]

約数ペア:

[(1, 21155116), (2, 10577558), (4, 5288779), (67, 315748), (134, 157874), (193, 109612), (268, 78937), (386, 54806), (409, 51724), (772, 27403), (818, 25862), (1636, 12931)]