19802223

素因数分解:

$3^2\times 7^2\times {\mathrm{83}}^1\times {\mathrm{541}}^1$

素因数の和:644

約数の個数: 36

約数和(自身を含む): 33736248

約数和(自身を除く): 13934025

約数列:

[1, 3, 7, 9, 21, 49, 63, 83, 147, 249, 441, 541, 581, 747, 1623, 1743, 3787, 4067, 4869, 5229, 11361, 12201, 26509, 34083, 36603, 44903, 79527, 134709, 238581, 314321, 404127, 942963, 2200247, 2828889, 6600741, 19802223]

約数ペア:

[(1, 19802223), (3, 6600741), (7, 2828889), (9, 2200247), (21, 942963), (49, 404127), (63, 314321), (83, 238581), (147, 134709), (249, 79527), (441, 44903), (541, 36603), (581, 34083), (747, 26509), (1623, 12201), (1743, 11361), (3787, 5229), (4067, 4869)]