20478760

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:286

約数の個数: 64

約数和(自身を含む): 48139920

約数和(自身を除く): 27661160

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 101, 137, 148, 185, 202, 274, 296, 370, 404, 505, 548, 685, 740, 808, 1010, 1096, 1370, 1480, 2020, 2740, 3737, 4040, 5069, 5480, 7474, 10138, 13837, 14948, 18685, 20276, 25345, 27674, 29896, 37370, 40552, 50690, 55348, 69185, 74740, 101380, 110696, 138370, 149480, 202760, 276740, 511969, 553480, 1023938, 2047876, 2559845, 4095752, 5119690, 10239380, 20478760]

約数ペア:

[(1, 20478760), (2, 10239380), (4, 5119690), (5, 4095752), (8, 2559845), (10, 2047876), (20, 1023938), (37, 553480), (40, 511969), (74, 276740), (101, 202760), (137, 149480), (148, 138370), (185, 110696), (202, 101380), (274, 74740), (296, 69185), (370, 55348), (404, 50690), (505, 40552), (548, 37370), (685, 29896), (740, 27674), (808, 25345), (1010, 20276), (1096, 18685), (1370, 14948), (1480, 13837), (2020, 10138), (2740, 7474), (3737, 5480), (4040, 5069)]