20984975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{557}}^1$

素因数の和:715

約数の個数: 24

約数和(自身を含む): 28645488

約数和(自身を除く): 7660513

約数列:

[1, 5, 11, 25, 55, 137, 275, 557, 685, 1507, 2785, 3425, 6127, 7535, 13925, 30635, 37675, 76309, 153175, 381545, 839399, 1907725, 4196995, 20984975]

約数ペア:

[(1, 20984975), (5, 4196995), (11, 1907725), (25, 839399), (55, 381545), (137, 153175), (275, 76309), (557, 37675), (685, 30635), (1507, 13925), (2785, 7535), (3425, 6127)]