81424040

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{10333}}^1$

素因数の和:10541

約数の個数: 32

約数和(自身を含む): 184151880

約数和(自身を除く): 102727840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 10333, 20666, 41332, 51665, 82664, 103330, 206660, 413320, 2035601, 4071202, 8142404, 10178005, 16284808, 20356010, 40712020, 81424040]

約数ペア:

[(1, 81424040), (2, 40712020), (4, 20356010), (5, 16284808), (8, 10178005), (10, 8142404), (20, 4071202), (40, 2035601), (197, 413320), (394, 206660), (788, 103330), (985, 82664), (1576, 51665), (1970, 41332), (3940, 20666), (7880, 10333)]