20897107

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{1217}}^1$

素因数の和:1458

約数の個数: 16

約数和(自身を含む): 26191872

約数和(自身を除く): 5294765

約数列:

[1, 7, 11, 77, 223, 1217, 1561, 2453, 8519, 13387, 17171, 93709, 271391, 1899737, 2985301, 20897107]

約数ペア:

[(1, 20897107), (7, 2985301), (11, 1899737), (77, 271391), (223, 93709), (1217, 17171), (1561, 13387), (2453, 8519)]