21008700

素因数分解:

$2^2\times 3^3\times 5^2\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:305

約数の個数: 144

約数和(自身を含む): 69995520

約数和(自身を除く): 48986820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 31, 36, 45, 50, 54, 60, 62, 75, 90, 93, 100, 108, 124, 135, 150, 155, 180, 186, 225, 251, 270, 279, 300, 310, 372, 450, 465, 502, 540, 558, 620, 675, 753, 775, 837, 900, 930, 1004, 1116, 1255, 1350, 1395, 1506, 1550, 1674, 1860, 2259, 2325, 2510, 2700, 2790, 3012, 3100, 3348, 3765, 4185, 4518, 4650, 5020, 5580, 6275, 6777, 6975, 7530, 7781, 8370, 9036, 9300, 11295, 12550, 13554, 13950, 15060, 15562, 16740, 18825, 20925, 22590, 23343, 25100, 27108, 27900, 31124, 33885, 37650, 38905, 41850, 45180, 46686, 56475, 67770, 70029, 75300, 77810, 83700, 93372, 112950, 116715, 135540, 140058, 155620, 169425, 194525, 210087, 225900, 233430, 280116, 338850, 350145, 389050, 420174, 466860, 583575, 677700, 700290, 778100, 840348, 1050435, 1167150, 1400580, 1750725, 2100870, 2334300, 3501450, 4201740, 5252175, 7002900, 10504350, 21008700]

約数ペア:

[(1, 21008700), (2, 10504350), (3, 7002900), (4, 5252175), (5, 4201740), (6, 3501450), (9, 2334300), (10, 2100870), (12, 1750725), (15, 1400580), (18, 1167150), (20, 1050435), (25, 840348), (27, 778100), (30, 700290), (31, 677700), (36, 583575), (45, 466860), (50, 420174), (54, 389050), (60, 350145), (62, 338850), (75, 280116), (90, 233430), (93, 225900), (100, 210087), (108, 194525), (124, 169425), (135, 155620), (150, 140058), (155, 135540), (180, 116715), (186, 112950), (225, 93372), (251, 83700), (270, 77810), (279, 75300), (300, 70029), (310, 67770), (372, 56475), (450, 46686), (465, 45180), (502, 41850), (540, 38905), (558, 37650), (620, 33885), (675, 31124), (753, 27900), (775, 27108), (837, 25100), (900, 23343), (930, 22590), (1004, 20925), (1116, 18825), (1255, 16740), (1350, 15562), (1395, 15060), (1506, 13950), (1550, 13554), (1674, 12550), (1860, 11295), (2259, 9300), (2325, 9036), (2510, 8370), (2700, 7781), (2790, 7530), (3012, 6975), (3100, 6777), (3348, 6275), (3765, 5580), (4185, 5020), (4518, 4650)]