20205025

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{31}}^2$

素因数の和:130

約数の個数: 27

約数和(自身を含む): 26811993

約数和(自身を除く): 6606968

約数列:

[1, 5, 25, 29, 31, 145, 155, 725, 775, 841, 899, 961, 4205, 4495, 4805, 21025, 22475, 24025, 26071, 27869, 130355, 139345, 651775, 696725, 808201, 4041005, 20205025]

約数ペア:

[(1, 20205025), (5, 4041005), (25, 808201), (29, 696725), (31, 651775), (145, 139345), (155, 130355), (725, 27869), (775, 26071), (841, 24025), (899, 22475), (961, 21025), (4205, 4805)]