21981665

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{1051}}^1$

素因数の和:1192

約数の個数: 16

約数和(自身を含む): 27267840

約数和(自身を除く): 5286175

約数列:

[1, 5, 47, 89, 235, 445, 1051, 4183, 5255, 20915, 49397, 93539, 246985, 467695, 4396333, 21981665]

約数ペア:

[(1, 21981665), (5, 4396333), (47, 467695), (89, 246985), (235, 93539), (445, 49397), (1051, 20915), (4183, 5255)]