20905703

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:951

約数の個数: 24

約数和(自身を含む): 26927712

約数和(自身を除く): 6022009

約数列:

[1, 7, 13, 37, 49, 91, 259, 481, 637, 887, 1813, 3367, 6209, 11531, 23569, 32819, 43463, 80717, 229733, 426647, 565019, 1608131, 2986529, 20905703]

約数ペア:

[(1, 20905703), (7, 2986529), (13, 1608131), (37, 565019), (49, 426647), (91, 229733), (259, 80717), (481, 43463), (637, 32819), (887, 23569), (1813, 11531), (3367, 6209)]