21381656

素因数分解:

$2^3\times {\mathrm{313}}^1\times {\mathrm{8539}}^1$

素因数の和:8858

約数の個数: 16

約数和(自身を含む): 40223400

約数和(自身を除く): 18841744

約数列:

[1, 2, 4, 8, 313, 626, 1252, 2504, 8539, 17078, 34156, 68312, 2672707, 5345414, 10690828, 21381656]

約数ペア:

[(1, 21381656), (2, 10690828), (4, 5345414), (8, 2672707), (313, 68312), (626, 34156), (1252, 17078), (2504, 8539)]