19906615

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 26542080

約数和(自身を除く): 6635465

約数列:

[1, 5, 23, 29, 47, 115, 127, 145, 235, 635, 667, 1081, 1363, 2921, 3335, 3683, 5405, 5969, 6815, 14605, 18415, 29845, 31349, 84709, 137287, 156745, 173101, 423545, 686435, 865505, 3981323, 19906615]

約数ペア:

[(1, 19906615), (5, 3981323), (23, 865505), (29, 686435), (47, 423545), (115, 173101), (127, 156745), (145, 137287), (235, 84709), (635, 31349), (667, 29845), (1081, 18415), (1363, 14605), (2921, 6815), (3335, 5969), (3683, 5405)]