20916973

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{257}}^1$

素因数の和:433

約数の個数: 24

約数和(自身を含む): 26823744

約数和(自身を除く): 5906771

約数列:

[1, 7, 11, 49, 77, 151, 257, 539, 1057, 1661, 1799, 2827, 7399, 11627, 12593, 19789, 38807, 81389, 138523, 271649, 426877, 1901543, 2988139, 20916973]

約数ペア:

[(1, 20916973), (7, 2988139), (11, 1901543), (49, 426877), (77, 271649), (151, 138523), (257, 81389), (539, 38807), (1057, 19789), (1661, 12593), (1799, 11627), (2827, 7399)]