21016540

素因数分解:

$2^2\times 5^1\times {\mathrm{983}}^1\times {\mathrm{1069}}^1$

素因数の和:2061

約数の個数: 24

約数和(自身を含む): 44220960

約数和(自身を除く): 23204420

約数列:

[1, 2, 4, 5, 10, 20, 983, 1069, 1966, 2138, 3932, 4276, 4915, 5345, 9830, 10690, 19660, 21380, 1050827, 2101654, 4203308, 5254135, 10508270, 21016540]

約数ペア:

[(1, 21016540), (2, 10508270), (4, 5254135), (5, 4203308), (10, 2101654), (20, 1050827), (983, 21380), (1069, 19660), (1966, 10690), (2138, 9830), (3932, 5345), (4276, 4915)]