21177784

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155719}}^1$

素因数の和:155742

約数の個数: 16

約数和(自身を含む): 42044400

約数和(自身を除く): 20866616

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155719, 311438, 622876, 1245752, 2647223, 5294446, 10588892, 21177784]

約数ペア:

[(1, 21177784), (2, 10588892), (4, 5294446), (8, 2647223), (17, 1245752), (34, 622876), (68, 311438), (136, 155719)]