21903905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{439}}^1\times {\mathrm{587}}^1$

素因数の和:1048

約数の個数: 16

約数和(自身を含む): 27941760

約数和(自身を除く): 6037855

約数列:

[1, 5, 17, 85, 439, 587, 2195, 2935, 7463, 9979, 37315, 49895, 257693, 1288465, 4380781, 21903905]

約数ペア:

[(1, 21903905), (5, 4380781), (17, 1288465), (85, 257693), (439, 49895), (587, 37315), (2195, 9979), (2935, 7463)]