21512361

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 33239808

約数和(自身を除く): 11727447

約数列:

[1, 3, 13, 17, 39, 51, 71, 213, 221, 457, 663, 923, 1207, 1371, 2769, 3621, 5941, 7769, 15691, 17823, 23307, 32447, 47073, 97341, 100997, 302991, 421811, 551599, 1265433, 1654797, 7170787, 21512361]

約数ペア:

[(1, 21512361), (3, 7170787), (13, 1654797), (17, 1265433), (39, 551599), (51, 421811), (71, 302991), (213, 100997), (221, 97341), (457, 47073), (663, 32447), (923, 23307), (1207, 17823), (1371, 15691), (2769, 7769), (3621, 5941)]