81811360

素因数分解:

$2^5\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1613}}^1$

素因数の和:1945

約数の個数: 48

約数和(自身を含む): 194009256

約数和(自身を除く): 112197896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 317, 634, 1268, 1585, 1613, 2536, 3170, 3226, 5072, 6340, 6452, 8065, 10144, 12680, 12904, 16130, 25360, 25808, 32260, 50720, 51616, 64520, 129040, 258080, 511321, 1022642, 2045284, 2556605, 4090568, 5113210, 8181136, 10226420, 16362272, 20452840, 40905680, 81811360]

約数ペア:

[(1, 81811360), (2, 40905680), (4, 20452840), (5, 16362272), (8, 10226420), (10, 8181136), (16, 5113210), (20, 4090568), (32, 2556605), (40, 2045284), (80, 1022642), (160, 511321), (317, 258080), (634, 129040), (1268, 64520), (1585, 51616), (1613, 50720), (2536, 32260), (3170, 25808), (3226, 25360), (5072, 16130), (6340, 12904), (6452, 12680), (8065, 10144)]