19993813

素因数分解:

$7^3\times {\mathrm{71}}^1\times {\mathrm{821}}^1$

素因数の和:913

約数の個数: 16

約数和(自身を含む): 23673600

約数和(自身を除く): 3679787

約数列:

[1, 7, 49, 71, 343, 497, 821, 3479, 5747, 24353, 40229, 58291, 281603, 408037, 2856259, 19993813]

約数ペア:

[(1, 19993813), (7, 2856259), (49, 408037), (71, 281603), (343, 58291), (497, 40229), (821, 24353), (3479, 5747)]