21059205

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13121}}^1$

素因数の和:13236

約数の個数: 16

約数和(自身を含む): 34012224

約数和(自身を除く): 12953019

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13121, 39363, 65605, 196815, 1403947, 4211841, 7019735, 21059205]

約数ペア:

[(1, 21059205), (3, 7019735), (5, 4211841), (15, 1403947), (107, 196815), (321, 65605), (535, 39363), (1605, 13121)]