21360395

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19687}}^1$

素因数の和:19730

約数の個数: 16

約数和(自身を含む): 30240768

約数和(自身を除く): 8880373

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19687, 98435, 137809, 610297, 689045, 3051485, 4272079, 21360395]

約数ペア:

[(1, 21360395), (5, 4272079), (7, 3051485), (31, 689045), (35, 610297), (155, 137809), (217, 98435), (1085, 19687)]