20541680

素因数分解:

$2^4\times 5^1\times {\mathrm{256771}}^1$

素因数の和:256784

約数の個数: 20

約数和(自身を含む): 47759592

約数和(自身を除く): 27217912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256771, 513542, 1027084, 1283855, 2054168, 2567710, 4108336, 5135420, 10270840, 20541680]

約数ペア:

[(1, 20541680), (2, 10270840), (4, 5135420), (5, 4108336), (8, 2567710), (10, 2054168), (16, 1283855), (20, 1027084), (40, 513542), (80, 256771)]