81212780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{907}}^1$

素因数の和:975

約数の個数: 72

約数和(自身を含む): 192739344

約数和(自身を除く): 111526564

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 121, 148, 185, 220, 242, 370, 407, 484, 605, 740, 814, 907, 1210, 1628, 1814, 2035, 2420, 3628, 4070, 4477, 4535, 8140, 8954, 9070, 9977, 17908, 18140, 19954, 22385, 33559, 39908, 44770, 49885, 67118, 89540, 99770, 109747, 134236, 167795, 199540, 219494, 335590, 369149, 438988, 548735, 671180, 738298, 1097470, 1476596, 1845745, 2194940, 3691490, 4060639, 7382980, 8121278, 16242556, 20303195, 40606390, 81212780]

約数ペア:

[(1, 81212780), (2, 40606390), (4, 20303195), (5, 16242556), (10, 8121278), (11, 7382980), (20, 4060639), (22, 3691490), (37, 2194940), (44, 1845745), (55, 1476596), (74, 1097470), (110, 738298), (121, 671180), (148, 548735), (185, 438988), (220, 369149), (242, 335590), (370, 219494), (407, 199540), (484, 167795), (605, 134236), (740, 109747), (814, 99770), (907, 89540), (1210, 67118), (1628, 49885), (1814, 44770), (2035, 39908), (2420, 33559), (3628, 22385), (4070, 19954), (4477, 18140), (4535, 17908), (8140, 9977), (8954, 9070)]