21871815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{3109}}^1$

素因数の和:3191

約数の個数: 32

約数和(自身を含む): 40604160

約数和(自身を除く): 18732345

約数列:

[1, 3, 5, 7, 15, 21, 35, 67, 105, 201, 335, 469, 1005, 1407, 2345, 3109, 7035, 9327, 15545, 21763, 46635, 65289, 108815, 208303, 326445, 624909, 1041515, 1458121, 3124545, 4374363, 7290605, 21871815]

約数ペア:

[(1, 21871815), (3, 7290605), (5, 4374363), (7, 3124545), (15, 1458121), (21, 1041515), (35, 624909), (67, 326445), (105, 208303), (201, 108815), (335, 65289), (469, 46635), (1005, 21763), (1407, 15545), (2345, 9327), (3109, 7035)]