20488760

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{4973}}^1$

素因数の和:5087

約数の個数: 32

約数和(自身を含む): 46556640

約数和(自身を除く): 26067880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 4973, 9946, 19892, 24865, 39784, 49730, 99460, 198920, 512219, 1024438, 2048876, 2561095, 4097752, 5122190, 10244380, 20488760]

約数ペア:

[(1, 20488760), (2, 10244380), (4, 5122190), (5, 4097752), (8, 2561095), (10, 2048876), (20, 1024438), (40, 512219), (103, 198920), (206, 99460), (412, 49730), (515, 39784), (824, 24865), (1030, 19892), (2060, 9946), (4120, 4973)]