19987943905

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{509}}^1\times {\mathrm{270821}}^1$

素因数の和:271364

約数の個数: 16

約数和(自身を含む): 24861459600

約数和(自身を除く): 4873515695

約数列:

[1, 5, 29, 145, 509, 2545, 14761, 73805, 270821, 1354105, 7853809, 39269045, 137847889, 689239445, 3997588781, 19987943905]

約数ペア:

[(1, 19987943905), (5, 3997588781), (29, 689239445), (145, 137847889), (509, 39269045), (2545, 7853809), (14761, 1354105), (73805, 270821)]