20979555

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{367}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 34904064

約数和(自身を除く): 13924509

約数列:

[1, 3, 5, 15, 37, 103, 111, 185, 309, 367, 515, 555, 1101, 1545, 1835, 3811, 5505, 11433, 13579, 19055, 37801, 40737, 57165, 67895, 113403, 189005, 203685, 567015, 1398637, 4195911, 6993185, 20979555]

約数ペア:

[(1, 20979555), (3, 6993185), (5, 4195911), (15, 1398637), (37, 567015), (103, 203685), (111, 189005), (185, 113403), (309, 67895), (367, 57165), (515, 40737), (555, 37801), (1101, 19055), (1545, 13579), (1835, 11433), (3811, 5505)]