21404695

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:451

約数の個数: 24

約数和(自身を含む): 28275696

約数和(自身を除く): 6871001

約数列:

[1, 5, 13, 65, 73, 169, 347, 365, 845, 949, 1735, 4511, 4745, 12337, 22555, 25331, 58643, 61685, 126655, 293215, 329303, 1646515, 4280939, 21404695]

約数ペア:

[(1, 21404695), (5, 4280939), (13, 1646515), (65, 329303), (73, 293215), (169, 126655), (347, 61685), (365, 58643), (845, 25331), (949, 22555), (1735, 12337), (4511, 4745)]