19201980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{349}}^1$

素因数の和:499

約数の個数: 96

約数和(自身を含む): 62092800

約数和(自身を除く): 42890820

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 131, 140, 210, 262, 349, 393, 420, 524, 655, 698, 786, 917, 1047, 1310, 1396, 1572, 1745, 1834, 1965, 2094, 2443, 2620, 2751, 3490, 3668, 3930, 4188, 4585, 4886, 5235, 5502, 6980, 7329, 7860, 9170, 9772, 10470, 11004, 12215, 13755, 14658, 18340, 20940, 24430, 27510, 29316, 36645, 45719, 48860, 55020, 73290, 91438, 137157, 146580, 182876, 228595, 274314, 320033, 457190, 548628, 640066, 685785, 914380, 960099, 1280132, 1371570, 1600165, 1920198, 2743140, 3200330, 3840396, 4800495, 6400660, 9600990, 19201980]

約数ペア:

[(1, 19201980), (2, 9600990), (3, 6400660), (4, 4800495), (5, 3840396), (6, 3200330), (7, 2743140), (10, 1920198), (12, 1600165), (14, 1371570), (15, 1280132), (20, 960099), (21, 914380), (28, 685785), (30, 640066), (35, 548628), (42, 457190), (60, 320033), (70, 274314), (84, 228595), (105, 182876), (131, 146580), (140, 137157), (210, 91438), (262, 73290), (349, 55020), (393, 48860), (420, 45719), (524, 36645), (655, 29316), (698, 27510), (786, 24430), (917, 20940), (1047, 18340), (1310, 14658), (1396, 13755), (1572, 12215), (1745, 11004), (1834, 10470), (1965, 9772), (2094, 9170), (2443, 7860), (2620, 7329), (2751, 6980), (3490, 5502), (3668, 5235), (3930, 4886), (4188, 4585)]