18670815

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{9649}}^1$

素因数の和:9703

約数の個数: 24

約数和(自身を含む): 33118800

約数和(自身を除く): 14447985

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 9649, 28947, 48245, 86841, 144735, 414907, 434205, 1244721, 2074535, 3734163, 6223605, 18670815]

約数ペア:

[(1, 18670815), (3, 6223605), (5, 3734163), (9, 2074535), (15, 1244721), (43, 434205), (45, 414907), (129, 144735), (215, 86841), (387, 48245), (645, 28947), (1935, 9649)]