21456565

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3709}}^1$

素因数の和:3816

約数の個数: 16

約数和(自身を含む): 28047600

約数和(自身を除く): 6591035

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3709, 5785, 18545, 48217, 241085, 330101, 1650505, 4291313, 21456565]

約数ペア:

[(1, 21456565), (5, 4291313), (13, 1650505), (65, 330101), (89, 241085), (445, 48217), (1157, 18545), (3709, 5785)]