81047920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{751}}^1$

素因数の和:854

約数の個数: 80

約数和(自身を含む): 201415680

約数和(自身を除く): 120367760

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, 751, 760, 1136, 1349, 1420, 1502, 1520, 2698, 2840, 3004, 3755, 5396, 5680, 6008, 6745, 7510, 10792, 12016, 13490, 14269, 15020, 21584, 26980, 28538, 30040, 53321, 53960, 57076, 60080, 71345, 106642, 107920, 114152, 142690, 213284, 228304, 266605, 285380, 426568, 533210, 570760, 853136, 1013099, 1066420, 1141520, 2026198, 2132840, 4052396, 4265680, 5065495, 8104792, 10130990, 16209584, 20261980, 40523960, 81047920]

約数ペア:

[(1, 81047920), (2, 40523960), (4, 20261980), (5, 16209584), (8, 10130990), (10, 8104792), (16, 5065495), (19, 4265680), (20, 4052396), (38, 2132840), (40, 2026198), (71, 1141520), (76, 1066420), (80, 1013099), (95, 853136), (142, 570760), (152, 533210), (190, 426568), (284, 285380), (304, 266605), (355, 228304), (380, 213284), (568, 142690), (710, 114152), (751, 107920), (760, 106642), (1136, 71345), (1349, 60080), (1420, 57076), (1502, 53960), (1520, 53321), (2698, 30040), (2840, 28538), (3004, 26980), (3755, 21584), (5396, 15020), (5680, 14269), (6008, 13490), (6745, 12016), (7510, 10792)]