81991520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39419}}^1$

素因数の和:39447

約数の個数: 48

約数和(自身を含む): 208610640

約数和(自身を除く): 126619120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 39419, 78838, 157676, 197095, 315352, 394190, 512447, 630704, 788380, 1024894, 1261408, 1576760, 2049788, 2562235, 3153520, 4099576, 5124470, 6307040, 8199152, 10248940, 16398304, 20497880, 40995760, 81991520]

約数ペア:

[(1, 81991520), (2, 40995760), (4, 20497880), (5, 16398304), (8, 10248940), (10, 8199152), (13, 6307040), (16, 5124470), (20, 4099576), (26, 3153520), (32, 2562235), (40, 2049788), (52, 1576760), (65, 1261408), (80, 1024894), (104, 788380), (130, 630704), (160, 512447), (208, 394190), (260, 315352), (416, 197095), (520, 157676), (1040, 78838), (2080, 39419)]