21990155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{5477}}^1$

素因数の和:5566

約数の個数: 16

約数和(自身を含む): 29186784

約数和(自身を除く): 7196629

約数列:

[1, 5, 11, 55, 73, 365, 803, 4015, 5477, 27385, 60247, 301235, 399821, 1999105, 4398031, 21990155]

約数ペア:

[(1, 21990155), (5, 4398031), (11, 1999105), (55, 399821), (73, 301235), (365, 60247), (803, 27385), (4015, 5477)]