21286856

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{156521}}^1$

素因数の和:156544

約数の個数: 16

約数和(自身を含む): 42260940

約数和(自身を除く): 20974084

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 156521, 313042, 626084, 1252168, 2660857, 5321714, 10643428, 21286856]

約数ペア:

[(1, 21286856), (2, 10643428), (4, 5321714), (8, 2660857), (17, 1252168), (34, 626084), (68, 313042), (136, 156521)]