20647725

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{587}}^1$

素因数の和:674

約数の個数: 48

約数和(自身を含む): 39664128

約数和(自身を除く): 19016403

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 67, 75, 105, 175, 201, 335, 469, 525, 587, 1005, 1407, 1675, 1761, 2345, 2935, 4109, 5025, 7035, 8805, 11725, 12327, 14675, 20545, 35175, 39329, 44025, 61635, 102725, 117987, 196645, 275303, 308175, 589935, 825909, 983225, 1376515, 2949675, 4129545, 6882575, 20647725]

約数ペア:

[(1, 20647725), (3, 6882575), (5, 4129545), (7, 2949675), (15, 1376515), (21, 983225), (25, 825909), (35, 589935), (67, 308175), (75, 275303), (105, 196645), (175, 117987), (201, 102725), (335, 61635), (469, 44025), (525, 39329), (587, 35175), (1005, 20545), (1407, 14675), (1675, 12327), (1761, 11725), (2345, 8805), (2935, 7035), (4109, 5025)]