21361280

素因数分解:

$2^7\times 5^1\times {\mathrm{33377}}^1$

素因数の和:33396

約数の個数: 32

約数和(自身を含む): 51068340

約数和(自身を除く): 29707060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33377, 66754, 133508, 166885, 267016, 333770, 534032, 667540, 1068064, 1335080, 2136128, 2670160, 4272256, 5340320, 10680640, 21361280]

約数ペア:

[(1, 21361280), (2, 10680640), (4, 5340320), (5, 4272256), (8, 2670160), (10, 2136128), (16, 1335080), (20, 1068064), (32, 667540), (40, 534032), (64, 333770), (80, 267016), (128, 166885), (160, 133508), (320, 66754), (640, 33377)]