18890921

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:333

約数の個数: 24

約数和(自身を含む): 23474880

約数和(自身を除く): 4583959

約数列:

[1, 7, 19, 49, 103, 133, 197, 721, 931, 1379, 1957, 3743, 5047, 9653, 13699, 20291, 26201, 95893, 142037, 183407, 385529, 994259, 2698703, 18890921]

約数ペア:

[(1, 18890921), (7, 2698703), (19, 994259), (49, 385529), (103, 183407), (133, 142037), (197, 95893), (721, 26201), (931, 20291), (1379, 13699), (1957, 9653), (3743, 5047)]