20616505

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6473}}^1$

素因数の和:6505

約数の個数: 24

約数和(自身を含む): 30997512

約数和(自身を除く): 10381007

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6473, 32365, 45311, 84149, 226555, 317177, 420745, 589043, 1585885, 2945215, 4123301, 20616505]

約数ペア:

[(1, 20616505), (5, 4123301), (7, 2945215), (13, 1585885), (35, 589043), (49, 420745), (65, 317177), (91, 226555), (245, 84149), (455, 45311), (637, 32365), (3185, 6473)]