81345040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145259}}^1$

素因数の和:145279

約数の個数: 40

約数和(自身を含む): 216146880

約数和(自身を除く): 134801840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145259, 290518, 581036, 726295, 1016813, 1162072, 1452590, 2033626, 2324144, 2905180, 4067252, 5084065, 5810360, 8134504, 10168130, 11620720, 16269008, 20336260, 40672520, 81345040]

約数ペア:

[(1, 81345040), (2, 40672520), (4, 20336260), (5, 16269008), (7, 11620720), (8, 10168130), (10, 8134504), (14, 5810360), (16, 5084065), (20, 4067252), (28, 2905180), (35, 2324144), (40, 2033626), (56, 1452590), (70, 1162072), (80, 1016813), (112, 726295), (140, 581036), (280, 290518), (560, 145259)]