20888945

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{337}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 33291648

約数和(自身を除く): 12402703

約数列:

[1, 5, 7, 11, 23, 35, 49, 55, 77, 115, 161, 245, 253, 337, 385, 539, 805, 1127, 1265, 1685, 1771, 2359, 2695, 3707, 5635, 7751, 8855, 11795, 12397, 16513, 18535, 25949, 38755, 54257, 61985, 82565, 85261, 129745, 181643, 271285, 379799, 426305, 596827, 908215, 1898995, 2984135, 4177789, 20888945]

約数ペア:

[(1, 20888945), (5, 4177789), (7, 2984135), (11, 1898995), (23, 908215), (35, 596827), (49, 426305), (55, 379799), (77, 271285), (115, 181643), (161, 129745), (245, 85261), (253, 82565), (337, 61985), (385, 54257), (539, 38755), (805, 25949), (1127, 18535), (1265, 16513), (1685, 12397), (1771, 11795), (2359, 8855), (2695, 7751), (3707, 5635)]