20757465

素因数分解:

$3^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{479}}^1$

素因数の和:603

約数の個数: 40

約数和(自身を含む): 37635840

約数和(自身を除く): 16878375

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 107, 135, 321, 405, 479, 535, 963, 1437, 1605, 2395, 2889, 4311, 4815, 7185, 8667, 12933, 14445, 21555, 38799, 43335, 51253, 64665, 153759, 193995, 256265, 461277, 768795, 1383831, 2306385, 4151493, 6919155, 20757465]

約数ペア:

[(1, 20757465), (3, 6919155), (5, 4151493), (9, 2306385), (15, 1383831), (27, 768795), (45, 461277), (81, 256265), (107, 193995), (135, 153759), (321, 64665), (405, 51253), (479, 43335), (535, 38799), (963, 21555), (1437, 14445), (1605, 12933), (2395, 8667), (2889, 7185), (4311, 4815)]