20887975

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{613}}^1$

素因数の和:699

約数の個数: 24

約数和(自身を含む): 27408960

約数和(自身を除く): 6520985

約数列:

[1, 5, 25, 29, 47, 145, 235, 613, 725, 1175, 1363, 3065, 6815, 15325, 17777, 28811, 34075, 88885, 144055, 444425, 720275, 835519, 4177595, 20887975]

約数ペア:

[(1, 20887975), (5, 4177595), (25, 835519), (29, 720275), (47, 444425), (145, 144055), (235, 88885), (613, 34075), (725, 28811), (1175, 17777), (1363, 15325), (3065, 6815)]