21266768

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30911}}^1$

素因数の和:30962

約数の個数: 20

約数和(自身を含む): 42163968

約数和(自身を除く): 20897200

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30911, 61822, 123644, 247288, 494576, 1329173, 2658346, 5316692, 10633384, 21266768]

約数ペア:

[(1, 21266768), (2, 10633384), (4, 5316692), (8, 2658346), (16, 1329173), (43, 494576), (86, 247288), (172, 123644), (344, 61822), (688, 30911)]