21357315

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67801}}^1$

素因数の和:67819

約数の個数: 24

約数和(自身を含む): 42308448

約数和(自身を除く): 20951133

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67801, 203403, 339005, 474607, 610209, 1017015, 1423821, 2373035, 3051045, 4271463, 7119105, 21357315]

約数ペア:

[(1, 21357315), (3, 7119105), (5, 4271463), (7, 3051045), (9, 2373035), (15, 1423821), (21, 1017015), (35, 610209), (45, 474607), (63, 339005), (105, 203403), (315, 67801)]