19778825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1013}}^1$

素因数の和:1105

約数の個数: 24

約数和(自身を含む): 27158976

約数和(自身を除く): 7380151

約数列:

[1, 5, 11, 25, 55, 71, 275, 355, 781, 1013, 1775, 3905, 5065, 11143, 19525, 25325, 55715, 71923, 278575, 359615, 791153, 1798075, 3955765, 19778825]

約数ペア:

[(1, 19778825), (5, 3955765), (11, 1798075), (25, 791153), (55, 359615), (71, 278575), (275, 71923), (355, 55715), (781, 25325), (1013, 19525), (1775, 11143), (3905, 5065)]