21040420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{28433}}^1$

素因数の和:28479

約数の個数: 24

約数和(自身を含む): 45380664

約数和(自身を除く): 24340244

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 185, 370, 740, 28433, 56866, 113732, 142165, 284330, 568660, 1052021, 2104042, 4208084, 5260105, 10520210, 21040420]

約数ペア:

[(1, 21040420), (2, 10520210), (4, 5260105), (5, 4208084), (10, 2104042), (20, 1052021), (37, 568660), (74, 284330), (148, 142165), (185, 113732), (370, 56866), (740, 28433)]