21856215

素因数分解:

$3^1\times 5^1\times {\mathrm{421}}^1\times {\mathrm{3461}}^1$

素因数の和:3890

約数の個数: 16

約数和(自身を含む): 35063136

約数和(自身を除く): 13206921

約数列:

[1, 3, 5, 15, 421, 1263, 2105, 3461, 6315, 10383, 17305, 51915, 1457081, 4371243, 7285405, 21856215]

約数ペア:

[(1, 21856215), (3, 7285405), (5, 4371243), (15, 1457081), (421, 51915), (1263, 17305), (2105, 10383), (3461, 6315)]