20515280

素因数分解:

$2^4\times 5^1\times {\mathrm{256441}}^1$

素因数の和:256454

約数の個数: 20

約数和(自身を含む): 47698212

約数和(自身を除く): 27182932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256441, 512882, 1025764, 1282205, 2051528, 2564410, 4103056, 5128820, 10257640, 20515280]

約数ペア:

[(1, 20515280), (2, 10257640), (4, 5128820), (5, 4103056), (8, 2564410), (10, 2051528), (16, 1282205), (20, 1025764), (40, 512882), (80, 256441)]