80220820

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{31583}}^1$

素因数の和:31719

約数の個数: 24

約数和(自身を含む): 169795584

約数和(自身を除く): 89574764

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 31583, 63166, 126332, 157915, 315830, 631660, 4011041, 8022082, 16044164, 20055205, 40110410, 80220820]

約数ペア:

[(1, 80220820), (2, 40110410), (4, 20055205), (5, 16044164), (10, 8022082), (20, 4011041), (127, 631660), (254, 315830), (508, 157915), (635, 126332), (1270, 63166), (2540, 31583)]