21130551

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{6689}}^1$

素因数の和:6717

約数の個数: 24

約数和(自身を含む): 34092240

約数和(自身を除く): 12961689

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 1053, 3159, 6689, 20067, 60201, 86957, 180603, 260871, 541809, 782613, 1625427, 2347839, 7043517, 21130551]

約数ペア:

[(1, 21130551), (3, 7043517), (9, 2347839), (13, 1625427), (27, 782613), (39, 541809), (81, 260871), (117, 180603), (243, 86957), (351, 60201), (1053, 20067), (3159, 6689)]