21707919

素因数分解:

$3^5\times {\mathrm{157}}^1\times {\mathrm{569}}^1$

素因数の和:741

約数の個数: 24

約数和(自身を含む): 32781840

約数和(自身を除く): 11073921

約数列:

[1, 3, 9, 27, 81, 157, 243, 471, 569, 1413, 1707, 4239, 5121, 12717, 15363, 38151, 46089, 89333, 138267, 267999, 803997, 2411991, 7235973, 21707919]

約数ペア:

[(1, 21707919), (3, 7235973), (9, 2411991), (27, 803997), (81, 267999), (157, 138267), (243, 89333), (471, 46089), (569, 38151), (1413, 15363), (1707, 12717), (4239, 5121)]