20987883

素因数分解:

$3^3\times 7^1\times {\mathrm{293}}^1\times {\mathrm{379}}^1$

素因数の和:688

約数の個数: 32

約数和(自身を含む): 35750400

約数和(自身を除く): 14762517

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 293, 379, 879, 1137, 2051, 2637, 2653, 3411, 6153, 7911, 7959, 10233, 18459, 23877, 55377, 71631, 111047, 333141, 777329, 999423, 2331987, 2998269, 6995961, 20987883]

約数ペア:

[(1, 20987883), (3, 6995961), (7, 2998269), (9, 2331987), (21, 999423), (27, 777329), (63, 333141), (189, 111047), (293, 71631), (379, 55377), (879, 23877), (1137, 18459), (2051, 10233), (2637, 7959), (2653, 7911), (3411, 6153)]