21720728

素因数分解:

$2^3\times {\mathrm{163}}^1\times {\mathrm{16657}}^1$

素因数の和:16826

約数の個数: 16

約数和(自身を含む): 40978680

約数和(自身を除く): 19257952

約数列:

[1, 2, 4, 8, 163, 326, 652, 1304, 16657, 33314, 66628, 133256, 2715091, 5430182, 10860364, 21720728]

約数ペア:

[(1, 21720728), (2, 10860364), (4, 5430182), (8, 2715091), (163, 133256), (326, 66628), (652, 33314), (1304, 16657)]