20989915

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{4933}}^1$

素因数の和:4998

約数の個数: 16

約数和(自身を含む): 26998848

約数和(自身を除く): 6008933

約数列:

[1, 5, 23, 37, 115, 185, 851, 4255, 4933, 24665, 113459, 182521, 567295, 912605, 4197983, 20989915]

約数ペア:

[(1, 20989915), (5, 4197983), (23, 912605), (37, 567295), (115, 182521), (185, 113459), (851, 24665), (4255, 4933)]