19992825

素因数分解:

$3^6\times 5^2\times {\mathrm{1097}}^1$

素因数の和:1125

約数の個数: 42

約数和(自身を含む): 37203534

約数和(自身を除く): 17210709

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 729, 1097, 1215, 2025, 3291, 3645, 5485, 6075, 9873, 16455, 18225, 27425, 29619, 49365, 82275, 88857, 148095, 246825, 266571, 444285, 740475, 799713, 1332855, 2221425, 3998565, 6664275, 19992825]

約数ペア:

[(1, 19992825), (3, 6664275), (5, 3998565), (9, 2221425), (15, 1332855), (25, 799713), (27, 740475), (45, 444285), (75, 266571), (81, 246825), (135, 148095), (225, 88857), (243, 82275), (405, 49365), (675, 29619), (729, 27425), (1097, 18225), (1215, 16455), (2025, 9873), (3291, 6075), (3645, 5485)]