20211999

素因数分解:

$3^1\times {\mathrm{103}}^1\times {\mathrm{149}}^1\times {\mathrm{439}}^1$

素因数の和:694

約数の個数: 16

約数和(自身を含む): 27456000

約数和(自身を除く): 7244001

約数列:

[1, 3, 103, 149, 309, 439, 447, 1317, 15347, 45217, 46041, 65411, 135651, 196233, 6737333, 20211999]

約数ペア:

[(1, 20211999), (3, 6737333), (103, 196233), (149, 135651), (309, 65411), (439, 46041), (447, 45217), (1317, 15347)]