20656415

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{337}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 28619136

約数和(自身を除く): 7962721

約数列:

[1, 5, 13, 23, 41, 65, 115, 205, 299, 337, 533, 943, 1495, 1685, 2665, 4381, 4715, 7751, 12259, 13817, 21905, 38755, 61295, 69085, 100763, 179621, 317791, 503815, 898105, 1588955, 4131283, 20656415]

約数ペア:

[(1, 20656415), (5, 4131283), (13, 1588955), (23, 898105), (41, 503815), (65, 317791), (115, 179621), (205, 100763), (299, 69085), (337, 61295), (533, 38755), (943, 21905), (1495, 13817), (1685, 12259), (2665, 7751), (4381, 4715)]