20689935

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 40891392

約数和(自身を除く): 20201457

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 67, 85, 105, 119, 173, 201, 255, 335, 357, 469, 519, 595, 865, 1005, 1139, 1211, 1407, 1785, 2345, 2595, 2941, 3417, 3633, 5695, 6055, 7035, 7973, 8823, 11591, 14705, 17085, 18165, 20587, 23919, 34773, 39865, 44115, 57955, 61761, 81137, 102935, 119595, 173865, 197047, 243411, 308805, 405685, 591141, 985235, 1217055, 1379329, 2955705, 4137987, 6896645, 20689935]

約数ペア:

[(1, 20689935), (3, 6896645), (5, 4137987), (7, 2955705), (15, 1379329), (17, 1217055), (21, 985235), (35, 591141), (51, 405685), (67, 308805), (85, 243411), (105, 197047), (119, 173865), (173, 119595), (201, 102935), (255, 81137), (335, 61761), (357, 57955), (469, 44115), (519, 39865), (595, 34773), (865, 23919), (1005, 20587), (1139, 18165), (1211, 17085), (1407, 14705), (1785, 11591), (2345, 8823), (2595, 7973), (2941, 7035), (3417, 6055), (3633, 5695)]