20819305

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{227}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 28957824

約数和(自身を除く): 8138519

約数列:

[1, 5, 13, 17, 65, 83, 85, 221, 227, 415, 1079, 1105, 1135, 1411, 2951, 3859, 5395, 7055, 14755, 18343, 18841, 19295, 50167, 91715, 94205, 244933, 250835, 320297, 1224665, 1601485, 4163861, 20819305]

約数ペア:

[(1, 20819305), (5, 4163861), (13, 1601485), (17, 1224665), (65, 320297), (83, 250835), (85, 244933), (221, 94205), (227, 91715), (415, 50167), (1079, 19295), (1105, 18841), (1135, 18343), (1411, 14755), (2951, 7055), (3859, 5395)]