21664640

素因数分解:

$2^7\times 5^1\times {\mathrm{33851}}^1$

素因数の和:33870

約数の個数: 32

約数和(自身を含む): 51793560

約数和(自身を除く): 30128920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33851, 67702, 135404, 169255, 270808, 338510, 541616, 677020, 1083232, 1354040, 2166464, 2708080, 4332928, 5416160, 10832320, 21664640]

約数ペア:

[(1, 21664640), (2, 10832320), (4, 5416160), (5, 4332928), (8, 2708080), (10, 2166464), (16, 1354040), (20, 1083232), (32, 677020), (40, 541616), (64, 338510), (80, 270808), (128, 169255), (160, 135404), (320, 67702), (640, 33851)]