20974545

素因数分解:

$3^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{283}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 38455872

約数和(自身を除く): 17481327

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 81, 135, 183, 243, 283, 305, 405, 549, 849, 915, 1215, 1415, 1647, 2547, 2745, 4245, 4941, 7641, 8235, 12735, 14823, 17263, 22923, 24705, 38205, 51789, 68769, 74115, 86315, 114615, 155367, 258945, 343845, 466101, 776835, 1398303, 2330505, 4194909, 6991515, 20974545]

約数ペア:

[(1, 20974545), (3, 6991515), (5, 4194909), (9, 2330505), (15, 1398303), (27, 776835), (45, 466101), (61, 343845), (81, 258945), (135, 155367), (183, 114615), (243, 86315), (283, 74115), (305, 68769), (405, 51789), (549, 38205), (849, 24705), (915, 22923), (1215, 17263), (1415, 14823), (1647, 12735), (2547, 8235), (2745, 7641), (4245, 4941)]