81071720

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{15959}}^1$

素因数の和:16097

約数の個数: 32

約数和(自身を含む): 183859200

約数和(自身を除く): 102787480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 5080, 15959, 31918, 63836, 79795, 127672, 159590, 319180, 638360, 2026793, 4053586, 8107172, 10133965, 16214344, 20267930, 40535860, 81071720]

約数ペア:

[(1, 81071720), (2, 40535860), (4, 20267930), (5, 16214344), (8, 10133965), (10, 8107172), (20, 4053586), (40, 2026793), (127, 638360), (254, 319180), (508, 159590), (635, 127672), (1016, 79795), (1270, 63836), (2540, 31918), (5080, 15959)]