20719515

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{421}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 35366976

約数和(自身を除く): 14647461

約数列:

[1, 3, 5, 15, 17, 51, 85, 193, 255, 421, 579, 965, 1263, 2105, 2895, 3281, 6315, 7157, 9843, 16405, 21471, 35785, 49215, 81253, 107355, 243759, 406265, 1218795, 1381301, 4143903, 6906505, 20719515]

約数ペア:

[(1, 20719515), (3, 6906505), (5, 4143903), (15, 1381301), (17, 1218795), (51, 406265), (85, 243759), (193, 107355), (255, 81253), (421, 49215), (579, 35785), (965, 21471), (1263, 16405), (2105, 9843), (2895, 7157), (3281, 6315)]