18991945

素因数分解:

$5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{3329}}^1$

素因数の和:3504

約数の個数: 16

約数和(自身を含む): 26213760

約数和(自身を除く): 7221815

約数列:

[1, 5, 7, 35, 163, 815, 1141, 3329, 5705, 16645, 23303, 116515, 542627, 2713135, 3798389, 18991945]

約数ペア:

[(1, 18991945), (5, 3798389), (7, 2713135), (35, 542627), (163, 116515), (815, 23303), (1141, 16645), (3329, 5705)]