278778873

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 387459072

約数和(自身を除く): 108680199

約数列:

[1, 3, 71, 97, 103, 131, 213, 291, 309, 393, 6887, 7313, 9301, 9991, 12707, 13493, 20661, 21939, 27903, 29973, 38121, 40479, 709361, 902197, 958003, 1308821, 2128083, 2706591, 2874009, 3926463, 92926291, 278778873]

約数ペア:

[(1, 278778873), (3, 92926291), (71, 3926463), (97, 2874009), (103, 2706591), (131, 2128083), (213, 1308821), (291, 958003), (309, 902197), (393, 709361), (6887, 40479), (7313, 38121), (9301, 29973), (9991, 27903), (12707, 21939), (13493, 20661)]