81986940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2099}}^1$

素因数の和:2152

約数の個数: 144

約数和(自身を含む): 293529600

約数和(自身を除く): 211542660

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 31, 35, 36, 42, 45, 60, 62, 63, 70, 84, 90, 93, 105, 124, 126, 140, 155, 180, 186, 210, 217, 252, 279, 310, 315, 372, 420, 434, 465, 558, 620, 630, 651, 868, 930, 1085, 1116, 1260, 1302, 1395, 1860, 1953, 2099, 2170, 2604, 2790, 3255, 3906, 4198, 4340, 5580, 6297, 6510, 7812, 8396, 9765, 10495, 12594, 13020, 14693, 18891, 19530, 20990, 25188, 29386, 31485, 37782, 39060, 41980, 44079, 58772, 62970, 65069, 73465, 75564, 88158, 94455, 125940, 130138, 132237, 146930, 176316, 188910, 195207, 220395, 260276, 264474, 293860, 325345, 377820, 390414, 440790, 455483, 528948, 585621, 650690, 661185, 780828, 881580, 910966, 976035, 1171242, 1301380, 1322370, 1366449, 1821932, 1952070, 2277415, 2342484, 2644740, 2732898, 2928105, 3904140, 4099347, 4554830, 5465796, 5856210, 6832245, 8198694, 9109660, 11712420, 13664490, 16397388, 20496735, 27328980, 40993470, 81986940]

約数ペア:

[(1, 81986940), (2, 40993470), (3, 27328980), (4, 20496735), (5, 16397388), (6, 13664490), (7, 11712420), (9, 9109660), (10, 8198694), (12, 6832245), (14, 5856210), (15, 5465796), (18, 4554830), (20, 4099347), (21, 3904140), (28, 2928105), (30, 2732898), (31, 2644740), (35, 2342484), (36, 2277415), (42, 1952070), (45, 1821932), (60, 1366449), (62, 1322370), (63, 1301380), (70, 1171242), (84, 976035), (90, 910966), (93, 881580), (105, 780828), (124, 661185), (126, 650690), (140, 585621), (155, 528948), (180, 455483), (186, 440790), (210, 390414), (217, 377820), (252, 325345), (279, 293860), (310, 264474), (315, 260276), (372, 220395), (420, 195207), (434, 188910), (465, 176316), (558, 146930), (620, 132237), (630, 130138), (651, 125940), (868, 94455), (930, 88158), (1085, 75564), (1116, 73465), (1260, 65069), (1302, 62970), (1395, 58772), (1860, 44079), (1953, 41980), (2099, 39060), (2170, 37782), (2604, 31485), (2790, 29386), (3255, 25188), (3906, 20990), (4198, 19530), (4340, 18891), (5580, 14693), (6297, 13020), (6510, 12594), (7812, 10495), (8396, 9765)]