21897395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{2459}}^1$

素因数の和:2614

約数の個数: 16

約数和(自身を含む): 28516320

約数和(自身を除く): 6618925

約数列:

[1, 5, 13, 65, 137, 685, 1781, 2459, 8905, 12295, 31967, 159835, 336883, 1684415, 4379479, 21897395]

約数ペア:

[(1, 21897395), (5, 4379479), (13, 1684415), (65, 336883), (137, 159835), (685, 31967), (1781, 12295), (2459, 8905)]