19997695

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{193}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 27153792

約数和(自身を除く): 7156097

約数列:

[1, 5, 17, 23, 53, 85, 115, 193, 265, 391, 901, 965, 1219, 1955, 3281, 4439, 4505, 6095, 10229, 16405, 20723, 22195, 51145, 75463, 103615, 173893, 235267, 377315, 869465, 1176335, 3999539, 19997695]

約数ペア:

[(1, 19997695), (5, 3999539), (17, 1176335), (23, 869465), (53, 377315), (85, 235267), (115, 173893), (193, 103615), (265, 75463), (391, 51145), (901, 22195), (965, 20723), (1219, 16405), (1955, 10229), (3281, 6095), (4439, 4505)]