20781618

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{457}}^1$

素因数の和:539

約数の個数: 64

約数和(自身を含む): 49859712

約数和(自身を除く): 29078094

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 53, 66, 78, 106, 143, 159, 286, 318, 429, 457, 583, 689, 858, 914, 1166, 1371, 1378, 1749, 2067, 2742, 3498, 4134, 5027, 5941, 7579, 10054, 11882, 15081, 15158, 17823, 22737, 24221, 30162, 35646, 45474, 48442, 65351, 72663, 130702, 145326, 196053, 266431, 314873, 392106, 532862, 629746, 799293, 944619, 1598586, 1889238, 3463603, 6927206, 10390809, 20781618]

約数ペア:

[(1, 20781618), (2, 10390809), (3, 6927206), (6, 3463603), (11, 1889238), (13, 1598586), (22, 944619), (26, 799293), (33, 629746), (39, 532862), (53, 392106), (66, 314873), (78, 266431), (106, 196053), (143, 145326), (159, 130702), (286, 72663), (318, 65351), (429, 48442), (457, 45474), (583, 35646), (689, 30162), (858, 24221), (914, 22737), (1166, 17823), (1371, 15158), (1378, 15081), (1749, 11882), (2067, 10054), (2742, 7579), (3498, 5941), (4134, 5027)]