20671245

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{479}}^1$

素因数の和:634

約数の個数: 48

約数和(自身を含む): 41333760

約数和(自身を除く): 20662515

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 137, 315, 411, 479, 685, 959, 1233, 1437, 2055, 2395, 2877, 3353, 4311, 4795, 6165, 7185, 8631, 10059, 14385, 16765, 21555, 30177, 43155, 50295, 65623, 150885, 196869, 328115, 459361, 590607, 984345, 1378083, 2296805, 2953035, 4134249, 6890415, 20671245]

約数ペア:

[(1, 20671245), (3, 6890415), (5, 4134249), (7, 2953035), (9, 2296805), (15, 1378083), (21, 984345), (35, 590607), (45, 459361), (63, 328115), (105, 196869), (137, 150885), (315, 65623), (411, 50295), (479, 43155), (685, 30177), (959, 21555), (1233, 16765), (1437, 14385), (2055, 10059), (2395, 8631), (2877, 7185), (3353, 6165), (4311, 4795)]