1991565240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{76481}}^1$

素因数の和:76533

約数の個数: 128

約数和(自身を含む): 7048581120

約数和(自身を除く): 5057015880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 31, 35, 40, 42, 56, 60, 62, 70, 84, 93, 105, 120, 124, 140, 155, 168, 186, 210, 217, 248, 280, 310, 372, 420, 434, 465, 620, 651, 744, 840, 868, 930, 1085, 1240, 1302, 1736, 1860, 2170, 2604, 3255, 3720, 4340, 5208, 6510, 8680, 13020, 26040, 76481, 152962, 229443, 305924, 382405, 458886, 535367, 611848, 764810, 917772, 1070734, 1147215, 1529620, 1606101, 1835544, 2141468, 2294430, 2370911, 2676835, 3059240, 3212202, 4282936, 4588860, 4741822, 5353670, 6424404, 7112733, 8030505, 9177720, 9483644, 10707340, 11854555, 12848808, 14225466, 16061010, 16596377, 18967288, 21414680, 23709110, 28450932, 32122020, 33192754, 35563665, 47418220, 49789131, 56901864, 64244040, 66385508, 71127330, 82981885, 94836440, 99578262, 132771016, 142254660, 165963770, 199156524, 248945655, 284509320, 331927540, 398313048, 497891310, 663855080, 995782620, 1991565240]

約数ペア:

[(1, 1991565240), (2, 995782620), (3, 663855080), (4, 497891310), (5, 398313048), (6, 331927540), (7, 284509320), (8, 248945655), (10, 199156524), (12, 165963770), (14, 142254660), (15, 132771016), (20, 99578262), (21, 94836440), (24, 82981885), (28, 71127330), (30, 66385508), (31, 64244040), (35, 56901864), (40, 49789131), (42, 47418220), (56, 35563665), (60, 33192754), (62, 32122020), (70, 28450932), (84, 23709110), (93, 21414680), (105, 18967288), (120, 16596377), (124, 16061010), (140, 14225466), (155, 12848808), (168, 11854555), (186, 10707340), (210, 9483644), (217, 9177720), (248, 8030505), (280, 7112733), (310, 6424404), (372, 5353670), (420, 4741822), (434, 4588860), (465, 4282936), (620, 3212202), (651, 3059240), (744, 2676835), (840, 2370911), (868, 2294430), (930, 2141468), (1085, 1835544), (1240, 1606101), (1302, 1529620), (1736, 1147215), (1860, 1070734), (2170, 917772), (2604, 764810), (3255, 611848), (3720, 535367), (4340, 458886), (5208, 382405), (6510, 305924), (8680, 229443), (13020, 152962), (26040, 76481)]