21489916

素因数分解:

$2^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{1973}}^1$

素因数の和:2373

約数の個数: 24

約数和(自身を含む): 43112160

約数和(自身を除く): 21622244

約数列:

[1, 2, 4, 7, 14, 28, 389, 778, 1556, 1973, 2723, 3946, 5446, 7892, 10892, 13811, 27622, 55244, 767497, 1534994, 3069988, 5372479, 10744958, 21489916]

約数ペア:

[(1, 21489916), (2, 10744958), (4, 5372479), (7, 3069988), (14, 1534994), (28, 767497), (389, 55244), (778, 27622), (1556, 13811), (1973, 10892), (2723, 7892), (3946, 5446)]