21339369

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15497}}^1$

素因数の和:15526

約数の個数: 20

約数和(自身を含む): 33754644

約数和(自身を除く): 12415275

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15497, 46491, 139473, 263449, 418419, 790347, 1255257, 2371041, 7113123, 21339369]

約数ペア:

[(1, 21339369), (3, 7113123), (9, 2371041), (17, 1255257), (27, 790347), (51, 418419), (81, 263449), (153, 139473), (459, 46491), (1377, 15497)]