81160820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{541}}^1\times {\mathrm{577}}^1$

素因数の和:1140

約数の個数: 48

約数和(自身を含む): 184206288

約数和(自身を除く): 103045468

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 541, 577, 1082, 1154, 2164, 2308, 2705, 2885, 5410, 5770, 7033, 7501, 10820, 11540, 14066, 15002, 28132, 30004, 35165, 37505, 70330, 75010, 140660, 150020, 312157, 624314, 1248628, 1560785, 3121570, 4058041, 6243140, 8116082, 16232164, 20290205, 40580410, 81160820]

約数ペア:

[(1, 81160820), (2, 40580410), (4, 20290205), (5, 16232164), (10, 8116082), (13, 6243140), (20, 4058041), (26, 3121570), (52, 1560785), (65, 1248628), (130, 624314), (260, 312157), (541, 150020), (577, 140660), (1082, 75010), (1154, 70330), (2164, 37505), (2308, 35165), (2705, 30004), (2885, 28132), (5410, 15002), (5770, 14066), (7033, 11540), (7501, 10820)]