21438513

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15569}}^1$

素因数の和:15598

約数の個数: 20

約数和(自身を含む): 33911460

約数和(自身を除く): 12472947

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15569, 46707, 140121, 264673, 420363, 794019, 1261089, 2382057, 7146171, 21438513]

約数ペア:

[(1, 21438513), (3, 7146171), (9, 2382057), (17, 1261089), (27, 794019), (51, 420363), (81, 264673), (153, 140121), (459, 46707), (1377, 15569)]