205811960

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{72469}}^1$

素因数の和:72551

約数の個数: 32

約数和(自身を含む): 469605600

約数和(自身を除く): 263793640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 72469, 144938, 289876, 362345, 579752, 724690, 1449380, 2898760, 5145299, 10290598, 20581196, 25726495, 41162392, 51452990, 102905980, 205811960]

約数ペア:

[(1, 205811960), (2, 102905980), (4, 51452990), (5, 41162392), (8, 25726495), (10, 20581196), (20, 10290598), (40, 5145299), (71, 2898760), (142, 1449380), (284, 724690), (355, 579752), (568, 362345), (710, 289876), (1420, 144938), (2840, 72469)]