21990476

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{223}}^1\times {\mathrm{277}}^1$

素因数の和:593

約数の個数: 24

約数和(自身を含む): 39231360

約数和(自身を除く): 17240884

約数列:

[1, 2, 4, 89, 178, 223, 277, 356, 446, 554, 892, 1108, 19847, 24653, 39694, 49306, 61771, 79388, 98612, 123542, 247084, 5497619, 10995238, 21990476]

約数ペア:

[(1, 21990476), (2, 10995238), (4, 5497619), (89, 247084), (178, 123542), (223, 98612), (277, 79388), (356, 61771), (446, 49306), (554, 39694), (892, 24653), (1108, 19847)]