21402115

素因数分解:

$5^1\times 7^1\times {\mathrm{743}}^1\times {\mathrm{823}}^1$

素因数の和:1578

約数の個数: 16

約数和(自身を含む): 29426688

約数和(自身を除く): 8024573

約数列:

[1, 5, 7, 35, 743, 823, 3715, 4115, 5201, 5761, 26005, 28805, 611489, 3057445, 4280423, 21402115]

約数ペア:

[(1, 21402115), (5, 4280423), (7, 3057445), (35, 611489), (743, 28805), (823, 26005), (3715, 5761), (4115, 5201)]