21112755

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{349}}^1$

素因数の和:503

約数の個数: 32

約数和(自身を含む): 35112000

約数和(自身を除く): 13999245

約数列:

[1, 3, 5, 15, 37, 109, 111, 185, 327, 349, 545, 555, 1047, 1635, 1745, 4033, 5235, 12099, 12913, 20165, 38041, 38739, 60495, 64565, 114123, 190205, 193695, 570615, 1407517, 4222551, 7037585, 21112755]

約数ペア:

[(1, 21112755), (3, 7037585), (5, 4222551), (15, 1407517), (37, 570615), (109, 193695), (111, 190205), (185, 114123), (327, 64565), (349, 60495), (545, 38739), (555, 38041), (1047, 20165), (1635, 12913), (1745, 12099), (4033, 5235)]