21019815

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{883}}^1$

素因数の和:940

約数の個数: 36

約数和(自身を含む): 38130456

約数和(自身を除く): 17110641

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 529, 883, 1035, 1587, 2645, 2649, 4415, 4761, 7935, 7947, 13245, 20309, 23805, 39735, 60927, 101545, 182781, 304635, 467107, 913905, 1401321, 2335535, 4203963, 7006605, 21019815]

約数ペア:

[(1, 21019815), (3, 7006605), (5, 4203963), (9, 2335535), (15, 1401321), (23, 913905), (45, 467107), (69, 304635), (115, 182781), (207, 101545), (345, 60927), (529, 39735), (883, 23805), (1035, 20309), (1587, 13245), (2645, 7947), (2649, 7935), (4415, 4761)]