19805751

素因数分解:

$3^2\times 7^2\times {\mathrm{97}}^1\times {\mathrm{463}}^1$

素因数の和:580

約数の個数: 36

約数和(自身を含む): 33694752

約数和(自身を除く): 13889001

約数列:

[1, 3, 7, 9, 21, 49, 63, 97, 147, 291, 441, 463, 679, 873, 1389, 2037, 3241, 4167, 4753, 6111, 9723, 14259, 22687, 29169, 42777, 44911, 68061, 134733, 204183, 314377, 404199, 943131, 2200639, 2829393, 6601917, 19805751]

約数ペア:

[(1, 19805751), (3, 6601917), (7, 2829393), (9, 2200639), (21, 943131), (49, 404199), (63, 314377), (97, 204183), (147, 134733), (291, 68061), (441, 44911), (463, 42777), (679, 29169), (873, 22687), (1389, 14259), (2037, 9723), (3241, 6111), (4167, 4753)]