81407860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131303}}^1$

素因数の和:131343

約数の個数: 24

約数和(自身を含む): 176472576

約数和(自身を除く): 95064716

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131303, 262606, 525212, 656515, 1313030, 2626060, 4070393, 8140786, 16281572, 20351965, 40703930, 81407860]

約数ペア:

[(1, 81407860), (2, 40703930), (4, 20351965), (5, 16281572), (10, 8140786), (20, 4070393), (31, 2626060), (62, 1313030), (124, 656515), (155, 525212), (310, 262606), (620, 131303)]