21384265

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19709}}^1$

素因数の和:19752

約数の個数: 16

約数和(自身を含む): 30274560

約数和(自身を除く): 8890295

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19709, 98545, 137963, 610979, 689815, 3054895, 4276853, 21384265]

約数ペア:

[(1, 21384265), (5, 4276853), (7, 3054895), (31, 689815), (35, 610979), (155, 137963), (217, 98545), (1085, 19709)]