21781120

素因数分解:

$2^7\times 5^1\times {\mathrm{34033}}^1$

素因数の和:34052

約数の個数: 32

約数和(自身を含む): 52072020

約数和(自身を除く): 30290900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 34033, 68066, 136132, 170165, 272264, 340330, 544528, 680660, 1089056, 1361320, 2178112, 2722640, 4356224, 5445280, 10890560, 21781120]

約数ペア:

[(1, 21781120), (2, 10890560), (4, 5445280), (5, 4356224), (8, 2722640), (10, 2178112), (16, 1361320), (20, 1089056), (32, 680660), (40, 544528), (64, 340330), (80, 272264), (128, 170165), (160, 136132), (320, 68066), (640, 34033)]