20866900

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{2939}}^1$

素因数の和:3024

約数の個数: 36

約数和(自身を含む): 45934560

約数和(自身を除く): 25067660

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 142, 284, 355, 710, 1420, 1775, 2939, 3550, 5878, 7100, 11756, 14695, 29390, 58780, 73475, 146950, 208669, 293900, 417338, 834676, 1043345, 2086690, 4173380, 5216725, 10433450, 20866900]

約数ペア:

[(1, 20866900), (2, 10433450), (4, 5216725), (5, 4173380), (10, 2086690), (20, 1043345), (25, 834676), (50, 417338), (71, 293900), (100, 208669), (142, 146950), (284, 73475), (355, 58780), (710, 29390), (1420, 14695), (1775, 11756), (2939, 7100), (3550, 5878)]