21216728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{204007}}^1$

素因数の和:204026

約数の個数: 16

約数和(自身を含む): 42841680

約数和(自身を除く): 21624952

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 204007, 408014, 816028, 1632056, 2652091, 5304182, 10608364, 21216728]

約数ペア:

[(1, 21216728), (2, 10608364), (4, 5304182), (8, 2652091), (13, 1632056), (26, 816028), (52, 408014), (104, 204007)]