28132839

素因数分解:

$3^6\times 7^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:211

約数の個数: 56

約数和(自身を含む): 49840800

約数和(自身を除く): 21707961

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 149, 189, 243, 259, 333, 447, 567, 729, 777, 999, 1043, 1341, 1701, 2331, 2997, 3129, 4023, 5103, 5513, 6993, 8991, 9387, 12069, 16539, 20979, 26973, 28161, 36207, 38591, 49617, 62937, 84483, 108621, 115773, 148851, 188811, 253449, 347319, 446553, 760347, 1041957, 1339659, 3125871, 4018977, 9377613, 28132839]

約数ペア:

[(1, 28132839), (3, 9377613), (7, 4018977), (9, 3125871), (21, 1339659), (27, 1041957), (37, 760347), (63, 446553), (81, 347319), (111, 253449), (149, 188811), (189, 148851), (243, 115773), (259, 108621), (333, 84483), (447, 62937), (567, 49617), (729, 38591), (777, 36207), (999, 28161), (1043, 26973), (1341, 20979), (1701, 16539), (2331, 12069), (2997, 9387), (3129, 8991), (4023, 6993), (5103, 5513)]