21136785

素因数分解:

$3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 34809600

約数和(自身を除く): 13672815

約数列:

[1, 3, 5, 15, 73, 97, 199, 219, 291, 365, 485, 597, 995, 1095, 1455, 2985, 7081, 14527, 19303, 21243, 35405, 43581, 57909, 72635, 96515, 106215, 217905, 289545, 1409119, 4227357, 7045595, 21136785]

約数ペア:

[(1, 21136785), (3, 7045595), (5, 4227357), (15, 1409119), (73, 289545), (97, 217905), (199, 106215), (219, 96515), (291, 72635), (365, 57909), (485, 43581), (597, 35405), (995, 21243), (1095, 19303), (1455, 14527), (2985, 7081)]