21641920

素因数分解:

$2^6\times 5^1\times {\mathrm{67631}}^1$

素因数の和:67648

約数の個数: 28

約数和(自身を含む): 51535584

約数和(自身を除く): 29893664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67631, 135262, 270524, 338155, 541048, 676310, 1082096, 1352620, 2164192, 2705240, 4328384, 5410480, 10820960, 21641920]

約数ペア:

[(1, 21641920), (2, 10820960), (4, 5410480), (5, 4328384), (8, 2705240), (10, 2164192), (16, 1352620), (20, 1082096), (32, 676310), (40, 541048), (64, 338155), (80, 270524), (160, 135262), (320, 67631)]