20689748

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{41}}^2\times {\mathrm{181}}^1$

素因数の和:284

約数の個数: 36

約数和(自身を含む): 39511836

約数和(自身を除く): 18822088

約数列:

[1, 2, 4, 17, 34, 41, 68, 82, 164, 181, 362, 697, 724, 1394, 1681, 2788, 3077, 3362, 6154, 6724, 7421, 12308, 14842, 28577, 29684, 57154, 114308, 126157, 252314, 304261, 504628, 608522, 1217044, 5172437, 10344874, 20689748]

約数ペア:

[(1, 20689748), (2, 10344874), (4, 5172437), (17, 1217044), (34, 608522), (41, 504628), (68, 304261), (82, 252314), (164, 126157), (181, 114308), (362, 57154), (697, 29684), (724, 28577), (1394, 14842), (1681, 12308), (2788, 7421), (3077, 6724), (3362, 6154)]