18940790

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{421}}^1$

素因数の和:848

約数の個数: 32

約数和(自身を含む): 37372320

約数和(自身を除く): 18431530

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 409, 421, 818, 842, 2045, 2105, 4090, 4210, 4499, 4631, 8998, 9262, 22495, 23155, 44990, 46310, 172189, 344378, 860945, 1721890, 1894079, 3788158, 9470395, 18940790]

約数ペア:

[(1, 18940790), (2, 9470395), (5, 3788158), (10, 1894079), (11, 1721890), (22, 860945), (55, 344378), (110, 172189), (409, 46310), (421, 44990), (818, 23155), (842, 22495), (2045, 9262), (2105, 8998), (4090, 4631), (4210, 4499)]