21405950

素因数分解:

$2^1\times 5^2\times {\mathrm{211}}^1\times {\mathrm{2029}}^1$

素因数の和:2252

約数の個数: 24

約数和(自身を含む): 40023480

約数和(自身を除く): 18617530

約数列:

[1, 2, 5, 10, 25, 50, 211, 422, 1055, 2029, 2110, 4058, 5275, 10145, 10550, 20290, 50725, 101450, 428119, 856238, 2140595, 4281190, 10702975, 21405950]

約数ペア:

[(1, 21405950), (2, 10702975), (5, 4281190), (10, 2140595), (25, 856238), (50, 428119), (211, 101450), (422, 50725), (1055, 20290), (2029, 10550), (2110, 10145), (4058, 5275)]