18781985

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1\times {\mathrm{277}}^1$

素因数の和:544

約数の個数: 16

約数和(自身を含む): 23058432

約数和(自身を除く): 4276447

約数列:

[1, 5, 71, 191, 277, 355, 955, 1385, 13561, 19667, 52907, 67805, 98335, 264535, 3756397, 18781985]

約数ペア:

[(1, 18781985), (5, 3756397), (71, 264535), (191, 98335), (277, 67805), (355, 52907), (955, 19667), (1385, 13561)]