20909075

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{547}}^1$

素因数の和:707

約数の個数: 24

約数和(自身を含む): 28539840

約数和(自身を除く): 7630765

約数列:

[1, 5, 11, 25, 55, 139, 275, 547, 695, 1529, 2735, 3475, 6017, 7645, 13675, 30085, 38225, 76033, 150425, 380165, 836363, 1900825, 4181815, 20909075]

約数ペア:

[(1, 20909075), (5, 4181815), (11, 1900825), (25, 836363), (55, 380165), (139, 150425), (275, 76033), (547, 38225), (695, 30085), (1529, 13675), (2735, 7645), (3475, 6017)]