21505395

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13399}}^1$

素因数の和:13514

約数の個数: 16

約数和(自身を含む): 34732800

約数和(自身を除く): 13227405

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 13399, 40197, 66995, 200985, 1433693, 4301079, 7168465, 21505395]

約数ペア:

[(1, 21505395), (3, 7168465), (5, 4301079), (15, 1433693), (107, 200985), (321, 66995), (535, 40197), (1605, 13399)]