28391605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{269}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 39657600

約数和(自身を除く): 11265995

約数列:

[1, 5, 11, 19, 55, 95, 101, 209, 269, 505, 1045, 1111, 1345, 1919, 2959, 5111, 5555, 9595, 14795, 21109, 25555, 27169, 56221, 105545, 135845, 281105, 298859, 516211, 1494295, 2581055, 5678321, 28391605]

約数ペア:

[(1, 28391605), (5, 5678321), (11, 2581055), (19, 1494295), (55, 516211), (95, 298859), (101, 281105), (209, 135845), (269, 105545), (505, 56221), (1045, 27169), (1111, 25555), (1345, 21109), (1919, 14795), (2959, 9595), (5111, 5555)]