20290945

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 27433728

約数和(自身を除く): 7142783

約数列:

[1, 5, 17, 23, 85, 97, 107, 115, 391, 485, 535, 1649, 1819, 1955, 2231, 2461, 8245, 9095, 10379, 11155, 12305, 37927, 41837, 51895, 176443, 189635, 209185, 238717, 882215, 1193585, 4058189, 20290945]

約数ペア:

[(1, 20290945), (5, 4058189), (17, 1193585), (23, 882215), (85, 238717), (97, 209185), (107, 189635), (115, 176443), (391, 51895), (485, 41837), (535, 37927), (1649, 12305), (1819, 11155), (1955, 10379), (2231, 9095), (2461, 8245)]