21786939

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{2963}}^1$

素因数の和:3031

約数の個数: 24

約数和(自身を含む): 33908160

約数和(自身を除く): 12121221

約数列:

[1, 3, 9, 19, 43, 57, 129, 171, 387, 817, 2451, 2963, 7353, 8889, 26667, 56297, 127409, 168891, 382227, 506673, 1146681, 2420771, 7262313, 21786939]

約数ペア:

[(1, 21786939), (3, 7262313), (9, 2420771), (19, 1146681), (43, 506673), (57, 382227), (129, 168891), (171, 127409), (387, 56297), (817, 26667), (2451, 8889), (2963, 7353)]