21256396

素因数分解:

$2^2\times 7^3\times {\mathrm{15493}}^1$

素因数の和:15518

約数の個数: 24

約数和(自身を含む): 43383200

約数和(自身を除く): 22126804

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 343, 686, 1372, 15493, 30986, 61972, 108451, 216902, 433804, 759157, 1518314, 3036628, 5314099, 10628198, 21256396]

約数ペア:

[(1, 21256396), (2, 10628198), (4, 5314099), (7, 3036628), (14, 1518314), (28, 759157), (49, 433804), (98, 216902), (196, 108451), (343, 61972), (686, 30986), (1372, 15493)]