21199773

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{457}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 33078592

約数和(自身を除く): 11878819

約数列:

[1, 3, 7, 21, 47, 141, 329, 457, 987, 1371, 2209, 3199, 6627, 9597, 15463, 21479, 46389, 64437, 150353, 451059, 1009513, 3028539, 7066591, 21199773]

約数ペア:

[(1, 21199773), (3, 7066591), (7, 3028539), (21, 1009513), (47, 451059), (141, 150353), (329, 64437), (457, 46389), (987, 21479), (1371, 15463), (2209, 9597), (3199, 6627)]