21381784

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{157219}}^1$

素因数の和:157242

約数の個数: 16

約数和(自身を含む): 42449400

約数和(自身を除く): 21067616

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 157219, 314438, 628876, 1257752, 2672723, 5345446, 10690892, 21381784]

約数ペア:

[(1, 21381784), (2, 10690892), (4, 5345446), (8, 2672723), (17, 1257752), (34, 628876), (68, 314438), (136, 157219)]