19894815

素因数分解:

$3^4\times 5^1\times {\mathrm{49123}}^1$

素因数の和:49140

約数の個数: 20

約数和(自身を含む): 35664024

約数和(自身を除く): 15769209

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49123, 147369, 245615, 442107, 736845, 1326321, 2210535, 3978963, 6631605, 19894815]

約数ペア:

[(1, 19894815), (3, 6631605), (5, 3978963), (9, 2210535), (15, 1326321), (27, 736845), (45, 442107), (81, 245615), (135, 147369), (405, 49123)]