19905705

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{10789}}^1$

素因数の和:10841

約数の個数: 24

約数和(自身を含む): 35348040

約数和(自身を除く): 15442335

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 10789, 32367, 53945, 97101, 161835, 442349, 485505, 1327047, 2211745, 3981141, 6635235, 19905705]

約数ペア:

[(1, 19905705), (3, 6635235), (5, 3981141), (9, 2211745), (15, 1327047), (41, 485505), (45, 442349), (123, 161835), (205, 97101), (369, 53945), (615, 32367), (1845, 10789)]