18921693

素因数分解:

$3^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1327}}^1$

素因数の和:1441

約数の個数: 24

約数和(自身を含む): 29672832

約数和(自身を除く): 10751139

約数列:

[1, 3, 7, 21, 49, 97, 147, 291, 679, 1327, 2037, 3981, 4753, 9289, 14259, 27867, 65023, 128719, 195069, 386157, 901033, 2703099, 6307231, 18921693]

約数ペア:

[(1, 18921693), (3, 6307231), (7, 2703099), (21, 901033), (49, 386157), (97, 195069), (147, 128719), (291, 65023), (679, 27867), (1327, 14259), (2037, 9289), (3981, 4753)]