81691040

素因数分解:

$2^5\times 5^1\times {\mathrm{510569}}^1$

素因数の和:510584

約数の個数: 24

約数和(自身を含む): 192995460

約数和(自身を除く): 111304420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 510569, 1021138, 2042276, 2552845, 4084552, 5105690, 8169104, 10211380, 16338208, 20422760, 40845520, 81691040]

約数ペア:

[(1, 81691040), (2, 40845520), (4, 20422760), (5, 16338208), (8, 10211380), (10, 8169104), (16, 5105690), (20, 4084552), (32, 2552845), (40, 2042276), (80, 1021138), (160, 510569)]