21262720

素因数分解:

$2^7\times 5^1\times {\mathrm{33223}}^1$

素因数の和:33242

約数の個数: 32

約数和(自身を含む): 50832720

約数和(自身を除く): 29570000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33223, 66446, 132892, 166115, 265784, 332230, 531568, 664460, 1063136, 1328920, 2126272, 2657840, 4252544, 5315680, 10631360, 21262720]

約数ペア:

[(1, 21262720), (2, 10631360), (4, 5315680), (5, 4252544), (8, 2657840), (10, 2126272), (16, 1328920), (20, 1063136), (32, 664460), (40, 531568), (64, 332230), (80, 265784), (128, 166115), (160, 132892), (320, 66446), (640, 33223)]