21861931

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 28464128

約数和(自身を除く): 6602197

約数列:

[1, 7, 13, 37, 43, 91, 151, 259, 301, 481, 559, 1057, 1591, 1963, 3367, 3913, 5587, 6493, 11137, 13741, 20683, 39109, 45451, 72631, 84409, 144781, 240241, 508417, 590863, 1681687, 3123133, 21861931]

約数ペア:

[(1, 21861931), (7, 3123133), (13, 1681687), (37, 590863), (43, 508417), (91, 240241), (151, 144781), (259, 84409), (301, 72631), (481, 45451), (559, 39109), (1057, 20683), (1591, 13741), (1963, 11137), (3367, 6493), (3913, 5587)]