20391945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1237}}^1$

素因数の和:1409

約数の個数: 32

約数和(自身を含む): 37555968

約数和(自身を除く): 17164023

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 157, 471, 785, 1099, 1237, 2355, 3297, 3711, 5495, 6185, 8659, 16485, 18555, 25977, 43295, 129885, 194209, 582627, 971045, 1359463, 2913135, 4078389, 6797315, 20391945]

約数ペア:

[(1, 20391945), (3, 6797315), (5, 4078389), (7, 2913135), (15, 1359463), (21, 971045), (35, 582627), (105, 194209), (157, 129885), (471, 43295), (785, 25977), (1099, 18555), (1237, 16485), (2355, 8659), (3297, 6185), (3711, 5495)]