81007940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311569}}^1$

素因数の和:311591

約数の個数: 24

約数和(自身を含む): 183203160

約数和(自身を除く): 102195220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 311569, 623138, 1246276, 1557845, 3115690, 4050397, 6231380, 8100794, 16201588, 20251985, 40503970, 81007940]

約数ペア:

[(1, 81007940), (2, 40503970), (4, 20251985), (5, 16201588), (10, 8100794), (13, 6231380), (20, 4050397), (26, 3115690), (52, 1557845), (65, 1246276), (130, 623138), (260, 311569)]