81908820

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:292

約数の個数: 240

約数和(自身を含む): 304432128

約数和(自身を除く): 222523308

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 31, 35, 36, 42, 45, 54, 60, 62, 63, 70, 81, 84, 90, 93, 105, 108, 124, 126, 135, 140, 155, 162, 180, 186, 189, 210, 217, 233, 252, 270, 279, 310, 315, 324, 372, 378, 405, 420, 434, 465, 466, 540, 558, 567, 620, 630, 651, 699, 756, 810, 837, 868, 930, 932, 945, 1085, 1116, 1134, 1165, 1260, 1302, 1395, 1398, 1620, 1631, 1674, 1860, 1890, 1953, 2097, 2170, 2268, 2330, 2511, 2604, 2790, 2796, 2835, 3255, 3262, 3348, 3495, 3780, 3906, 4185, 4194, 4340, 4660, 4893, 5022, 5580, 5670, 5859, 6291, 6510, 6524, 6990, 7223, 7812, 8155, 8370, 8388, 9765, 9786, 10044, 10485, 11340, 11718, 12555, 12582, 13020, 13980, 14446, 14679, 16310, 16740, 17577, 18873, 19530, 19572, 20970, 21669, 23436, 24465, 25110, 25164, 28892, 29295, 29358, 31455, 32620, 35154, 36115, 37746, 39060, 41940, 43338, 44037, 48930, 50220, 50561, 58590, 58716, 62910, 65007, 70308, 72230, 73395, 75492, 86676, 87885, 88074, 94365, 97860, 101122, 108345, 117180, 125820, 130014, 132111, 144460, 146790, 151683, 175770, 176148, 188730, 195021, 202244, 216690, 220185, 252805, 260028, 264222, 293580, 303366, 325035, 351540, 377460, 390042, 433380, 440370, 455049, 505610, 528444, 585063, 606732, 650070, 660555, 758415, 780084, 880740, 910098, 975105, 1011220, 1170126, 1300140, 1321110, 1365147, 1516830, 1820196, 1950210, 2275245, 2340252, 2642220, 2730294, 2925315, 3033660, 3900420, 4095441, 4550490, 5460588, 5850630, 6825735, 8190882, 9100980, 11701260, 13651470, 16381764, 20477205, 27302940, 40954410, 81908820]

約数ペア:

[(1, 81908820), (2, 40954410), (3, 27302940), (4, 20477205), (5, 16381764), (6, 13651470), (7, 11701260), (9, 9100980), (10, 8190882), (12, 6825735), (14, 5850630), (15, 5460588), (18, 4550490), (20, 4095441), (21, 3900420), (27, 3033660), (28, 2925315), (30, 2730294), (31, 2642220), (35, 2340252), (36, 2275245), (42, 1950210), (45, 1820196), (54, 1516830), (60, 1365147), (62, 1321110), (63, 1300140), (70, 1170126), (81, 1011220), (84, 975105), (90, 910098), (93, 880740), (105, 780084), (108, 758415), (124, 660555), (126, 650070), (135, 606732), (140, 585063), (155, 528444), (162, 505610), (180, 455049), (186, 440370), (189, 433380), (210, 390042), (217, 377460), (233, 351540), (252, 325035), (270, 303366), (279, 293580), (310, 264222), (315, 260028), (324, 252805), (372, 220185), (378, 216690), (405, 202244), (420, 195021), (434, 188730), (465, 176148), (466, 175770), (540, 151683), (558, 146790), (567, 144460), (620, 132111), (630, 130014), (651, 125820), (699, 117180), (756, 108345), (810, 101122), (837, 97860), (868, 94365), (930, 88074), (932, 87885), (945, 86676), (1085, 75492), (1116, 73395), (1134, 72230), (1165, 70308), (1260, 65007), (1302, 62910), (1395, 58716), (1398, 58590), (1620, 50561), (1631, 50220), (1674, 48930), (1860, 44037), (1890, 43338), (1953, 41940), (2097, 39060), (2170, 37746), (2268, 36115), (2330, 35154), (2511, 32620), (2604, 31455), (2790, 29358), (2796, 29295), (2835, 28892), (3255, 25164), (3262, 25110), (3348, 24465), (3495, 23436), (3780, 21669), (3906, 20970), (4185, 19572), (4194, 19530), (4340, 18873), (4660, 17577), (4893, 16740), (5022, 16310), (5580, 14679), (5670, 14446), (5859, 13980), (6291, 13020), (6510, 12582), (6524, 12555), (6990, 11718), (7223, 11340), (7812, 10485), (8155, 10044), (8370, 9786), (8388, 9765)]