20818539

素因数分解:

$3^5\times 7^1\times {\mathrm{12239}}^1$

素因数の和:12261

約数の個数: 24

約数和(自身を含む): 35642880

約数和(自身を除く): 14824341

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12239, 36717, 85673, 110151, 257019, 330453, 771057, 991359, 2313171, 2974077, 6939513, 20818539]

約数ペア:

[(1, 20818539), (3, 6939513), (7, 2974077), (9, 2313171), (21, 991359), (27, 771057), (63, 330453), (81, 257019), (189, 110151), (243, 85673), (567, 36717), (1701, 12239)]