20160981

素因数分解:

$3^5\times {\mathrm{163}}^1\times {\mathrm{509}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 30444960

約数和(自身を除く): 10283979

約数列:

[1, 3, 9, 27, 81, 163, 243, 489, 509, 1467, 1527, 4401, 4581, 13203, 13743, 39609, 41229, 82967, 123687, 248901, 746703, 2240109, 6720327, 20160981]

約数ペア:

[(1, 20160981), (3, 6720327), (9, 2240109), (27, 746703), (81, 248901), (163, 123687), (243, 82967), (489, 41229), (509, 39609), (1467, 13743), (1527, 13203), (4401, 4581)]