21369215

素因数分解:

$5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{10009}}^1$

素因数の和:10082

約数の個数: 16

約数和(自身を含む): 29789760

約数和(自身を除く): 8420545

約数列:

[1, 5, 7, 35, 61, 305, 427, 2135, 10009, 50045, 70063, 350315, 610549, 3052745, 4273843, 21369215]

約数ペア:

[(1, 21369215), (5, 4273843), (7, 3052745), (35, 610549), (61, 350315), (305, 70063), (427, 50045), (2135, 10009)]