19987235

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{307}}^1\times {\mathrm{449}}^1$

素因数の和:790

約数の個数: 16

約数和(自身を含む): 24948000

約数和(自身を除く): 4960765

約数列:

[1, 5, 29, 145, 307, 449, 1535, 2245, 8903, 13021, 44515, 65105, 137843, 689215, 3997447, 19987235]

約数ペア:

[(1, 19987235), (5, 3997447), (29, 689215), (145, 137843), (307, 65105), (449, 44515), (1535, 13021), (2245, 8903)]