21400640

素因数分解:

$2^6\times 5^1\times {\mathrm{66877}}^1$

素因数の和:66894

約数の個数: 28

約数和(自身を含む): 50961036

約数和(自身を除く): 29560396

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66877, 133754, 267508, 334385, 535016, 668770, 1070032, 1337540, 2140064, 2675080, 4280128, 5350160, 10700320, 21400640]

約数ペア:

[(1, 21400640), (2, 10700320), (4, 5350160), (5, 4280128), (8, 2675080), (10, 2140064), (16, 1337540), (20, 1070032), (32, 668770), (40, 535016), (64, 334385), (80, 267508), (160, 133754), (320, 66877)]