19389877

素因数分解:

${\mathrm{13}}^2\times {\mathrm{17}}^2\times {\mathrm{397}}^1$

素因数の和:457

約数の個数: 18

約数和(自身を含む): 22360038

約数和(自身を除く): 2970161

約数列:

[1, 13, 17, 169, 221, 289, 397, 2873, 3757, 5161, 6749, 48841, 67093, 87737, 114733, 1140581, 1491529, 19389877]

約数ペア:

[(1, 19389877), (13, 1491529), (17, 1140581), (169, 114733), (221, 87737), (289, 67093), (397, 48841), (2873, 6749), (3757, 5161)]