20743415

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 32503680

約数和(自身を除く): 11760265

約数列:

[1, 5, 7, 11, 35, 43, 49, 55, 77, 179, 215, 245, 301, 385, 473, 539, 895, 1253, 1505, 1969, 2107, 2365, 2695, 3311, 6265, 7697, 8771, 9845, 10535, 13783, 16555, 23177, 38485, 43855, 53879, 68915, 84667, 96481, 115885, 269395, 377153, 423335, 482405, 592669, 1885765, 2963345, 4148683, 20743415]

約数ペア:

[(1, 20743415), (5, 4148683), (7, 2963345), (11, 1885765), (35, 592669), (43, 482405), (49, 423335), (55, 377153), (77, 269395), (179, 115885), (215, 96481), (245, 84667), (301, 68915), (385, 53879), (473, 43855), (539, 38485), (895, 23177), (1253, 16555), (1505, 13783), (1969, 10535), (2107, 9845), (2365, 8771), (2695, 7697), (3311, 6265)]