78457840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{727}}^1$

素因数の和:830

約数の個数: 80

約数和(自身を含む): 194987520

約数和(自身を除く): 116529680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 71, 76, 80, 95, 142, 152, 190, 284, 304, 355, 380, 568, 710, 727, 760, 1136, 1349, 1420, 1454, 1520, 2698, 2840, 2908, 3635, 5396, 5680, 5816, 6745, 7270, 10792, 11632, 13490, 13813, 14540, 21584, 26980, 27626, 29080, 51617, 53960, 55252, 58160, 69065, 103234, 107920, 110504, 138130, 206468, 221008, 258085, 276260, 412936, 516170, 552520, 825872, 980723, 1032340, 1105040, 1961446, 2064680, 3922892, 4129360, 4903615, 7845784, 9807230, 15691568, 19614460, 39228920, 78457840]

約数ペア:

[(1, 78457840), (2, 39228920), (4, 19614460), (5, 15691568), (8, 9807230), (10, 7845784), (16, 4903615), (19, 4129360), (20, 3922892), (38, 2064680), (40, 1961446), (71, 1105040), (76, 1032340), (80, 980723), (95, 825872), (142, 552520), (152, 516170), (190, 412936), (284, 276260), (304, 258085), (355, 221008), (380, 206468), (568, 138130), (710, 110504), (727, 107920), (760, 103234), (1136, 69065), (1349, 58160), (1420, 55252), (1454, 53960), (1520, 51617), (2698, 29080), (2840, 27626), (2908, 26980), (3635, 21584), (5396, 14540), (5680, 13813), (5816, 13490), (6745, 11632), (7270, 10792)]