21530240

素因数分解:

$2^7\times 5^1\times {\mathrm{33641}}^1$

素因数の和:33660

約数の個数: 32

約数和(自身を含む): 51472260

約数和(自身を除く): 29942020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33641, 67282, 134564, 168205, 269128, 336410, 538256, 672820, 1076512, 1345640, 2153024, 2691280, 4306048, 5382560, 10765120, 21530240]

約数ペア:

[(1, 21530240), (2, 10765120), (4, 5382560), (5, 4306048), (8, 2691280), (10, 2153024), (16, 1345640), (20, 1076512), (32, 672820), (40, 538256), (64, 336410), (80, 269128), (128, 168205), (160, 134564), (320, 67282), (640, 33641)]