20398815

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{19709}}^1$

素因数の和:19743

約数の個数: 24

約数和(自身を含む): 36897120

約数和(自身を除く): 16498305

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 19709, 59127, 98545, 177381, 295635, 453307, 886905, 1359921, 2266535, 4079763, 6799605, 20398815]

約数ペア:

[(1, 20398815), (3, 6799605), (5, 4079763), (9, 2266535), (15, 1359921), (23, 886905), (45, 453307), (69, 295635), (115, 177381), (207, 98545), (345, 59127), (1035, 19709)]