19947655

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6263}}^1$

素因数の和:6295

約数の個数: 24

約数和(自身を含む): 29992032

約数和(自身を除く): 10044377

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6263, 31315, 43841, 81419, 219205, 306887, 407095, 569933, 1534435, 2849665, 3989531, 19947655]

約数ペア:

[(1, 19947655), (5, 3989531), (7, 2849665), (13, 1534435), (35, 569933), (49, 407095), (65, 306887), (91, 219205), (245, 81419), (455, 43841), (637, 31315), (3185, 6263)]