20915055

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{991}}^1$

素因数の和:1076

約数の個数: 48

約数和(自身を含む): 42092544

約数和(自身を除く): 21177489

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 67, 105, 201, 315, 335, 469, 603, 991, 1005, 1407, 2345, 2973, 3015, 4221, 4955, 6937, 7035, 8919, 14865, 20811, 21105, 34685, 44595, 62433, 66397, 104055, 199191, 312165, 331985, 464779, 597573, 995955, 1394337, 2323895, 2987865, 4183011, 6971685, 20915055]

約数ペア:

[(1, 20915055), (3, 6971685), (5, 4183011), (7, 2987865), (9, 2323895), (15, 1394337), (21, 995955), (35, 597573), (45, 464779), (63, 331985), (67, 312165), (105, 199191), (201, 104055), (315, 66397), (335, 62433), (469, 44595), (603, 34685), (991, 21105), (1005, 20811), (1407, 14865), (2345, 8919), (2973, 7035), (3015, 6937), (4221, 4955)]