18939605

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1721}}^1$

素因数の和:1828

約数の個数: 16

約数和(自身を含む): 23804928

約数和(自身を除く): 4865323

約数列:

[1, 5, 31, 71, 155, 355, 1721, 2201, 8605, 11005, 53351, 122191, 266755, 610955, 3787921, 18939605]

約数ペア:

[(1, 18939605), (5, 3787921), (31, 610955), (71, 266755), (155, 122191), (355, 53351), (1721, 11005), (2201, 8605)]