18778820540

素因数分解:

$2^2\times 5^1\times {\mathrm{557}}^1\times {\mathrm{1685711}}^1$

素因数の和:1686277

約数の個数: 24

約数和(自身を含む): 39506346432

約数和(自身を除く): 20727525892

約数列:

[1, 2, 4, 5, 10, 20, 557, 1114, 2228, 2785, 5570, 11140, 1685711, 3371422, 6742844, 8428555, 16857110, 33714220, 938941027, 1877882054, 3755764108, 4694705135, 9389410270, 18778820540]

約数ペア:

[(1, 18778820540), (2, 9389410270), (4, 4694705135), (5, 3755764108), (10, 1877882054), (20, 938941027), (557, 33714220), (1114, 16857110), (2228, 8428555), (2785, 6742844), (5570, 3371422), (11140, 1685711)]