18939676

素因数分解:

$2^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1361}}^1$

素因数の和:1450

約数の個数: 36

約数和(自身を含む): 39127536

約数和(自身を除く): 20187860

約数列:

[1, 2, 4, 7, 14, 28, 49, 71, 98, 142, 196, 284, 497, 994, 1361, 1988, 2722, 3479, 5444, 6958, 9527, 13916, 19054, 38108, 66689, 96631, 133378, 193262, 266756, 386524, 676417, 1352834, 2705668, 4734919, 9469838, 18939676]

約数ペア:

[(1, 18939676), (2, 9469838), (4, 4734919), (7, 2705668), (14, 1352834), (28, 676417), (49, 386524), (71, 266756), (98, 193262), (142, 133378), (196, 96631), (284, 66689), (497, 38108), (994, 19054), (1361, 13916), (1988, 9527), (2722, 6958), (3479, 5444)]