20859965

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{25913}}^1$

素因数の和:25948

約数の個数: 16

約数和(自身を含む): 29852928

約数和(自身を除く): 8992963

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 25913, 129565, 181391, 595999, 906955, 2979995, 4171993, 20859965]

約数ペア:

[(1, 20859965), (5, 4171993), (7, 2979995), (23, 906955), (35, 595999), (115, 181391), (161, 129565), (805, 25913)]