21861680

素因数分解:

$2^4\times 5^1\times {\mathrm{273271}}^1$

素因数の和:273284

約数の個数: 20

約数和(自身を含む): 50828592

約数和(自身を除く): 28966912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273271, 546542, 1093084, 1366355, 2186168, 2732710, 4372336, 5465420, 10930840, 21861680]

約数ペア:

[(1, 21861680), (2, 10930840), (4, 5465420), (5, 4372336), (8, 2732710), (10, 2186168), (16, 1366355), (20, 1093084), (40, 546542), (80, 273271)]