81138960

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{947}}^1$

素因数の和:990

約数の個数: 240

約数和(自身を含む): 330086016

約数和(自身を除く): 248947056

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 21, 24, 28, 30, 34, 35, 36, 40, 42, 45, 48, 51, 56, 60, 63, 68, 70, 72, 80, 84, 85, 90, 102, 105, 112, 119, 120, 126, 136, 140, 144, 153, 168, 170, 180, 204, 210, 238, 240, 252, 255, 272, 280, 306, 315, 336, 340, 357, 360, 408, 420, 476, 504, 510, 560, 595, 612, 630, 680, 714, 720, 765, 816, 840, 947, 952, 1008, 1020, 1071, 1190, 1224, 1260, 1360, 1428, 1530, 1680, 1785, 1894, 1904, 2040, 2142, 2380, 2448, 2520, 2841, 2856, 3060, 3570, 3788, 4080, 4284, 4735, 4760, 5040, 5355, 5682, 5712, 6120, 6629, 7140, 7576, 8523, 8568, 9470, 9520, 10710, 11364, 12240, 13258, 14205, 14280, 15152, 16099, 17046, 17136, 18940, 19887, 21420, 22728, 26516, 28410, 28560, 32198, 33145, 34092, 37880, 39774, 42615, 42840, 45456, 48297, 53032, 56820, 59661, 64396, 66290, 68184, 75760, 79548, 80495, 85230, 85680, 96594, 99435, 106064, 112693, 113640, 119322, 128792, 132580, 136368, 144891, 159096, 160990, 170460, 193188, 198870, 225386, 227280, 238644, 241485, 257584, 265160, 289782, 298305, 318192, 321980, 338079, 340920, 386376, 397740, 450772, 477288, 482970, 530320, 563465, 579564, 596610, 643960, 676158, 681840, 724455, 772752, 795480, 901544, 954576, 965940, 1014237, 1126930, 1159128, 1193220, 1287920, 1352316, 1448910, 1590960, 1690395, 1803088, 1931880, 2028474, 2253860, 2318256, 2386440, 2704632, 2897820, 3380790, 3863760, 4056948, 4507720, 4772880, 5071185, 5409264, 5795640, 6761580, 8113896, 9015440, 10142370, 11591280, 13523160, 16227792, 20284740, 27046320, 40569480, 81138960]

約数ペア:

[(1, 81138960), (2, 40569480), (3, 27046320), (4, 20284740), (5, 16227792), (6, 13523160), (7, 11591280), (8, 10142370), (9, 9015440), (10, 8113896), (12, 6761580), (14, 5795640), (15, 5409264), (16, 5071185), (17, 4772880), (18, 4507720), (20, 4056948), (21, 3863760), (24, 3380790), (28, 2897820), (30, 2704632), (34, 2386440), (35, 2318256), (36, 2253860), (40, 2028474), (42, 1931880), (45, 1803088), (48, 1690395), (51, 1590960), (56, 1448910), (60, 1352316), (63, 1287920), (68, 1193220), (70, 1159128), (72, 1126930), (80, 1014237), (84, 965940), (85, 954576), (90, 901544), (102, 795480), (105, 772752), (112, 724455), (119, 681840), (120, 676158), (126, 643960), (136, 596610), (140, 579564), (144, 563465), (153, 530320), (168, 482970), (170, 477288), (180, 450772), (204, 397740), (210, 386376), (238, 340920), (240, 338079), (252, 321980), (255, 318192), (272, 298305), (280, 289782), (306, 265160), (315, 257584), (336, 241485), (340, 238644), (357, 227280), (360, 225386), (408, 198870), (420, 193188), (476, 170460), (504, 160990), (510, 159096), (560, 144891), (595, 136368), (612, 132580), (630, 128792), (680, 119322), (714, 113640), (720, 112693), (765, 106064), (816, 99435), (840, 96594), (947, 85680), (952, 85230), (1008, 80495), (1020, 79548), (1071, 75760), (1190, 68184), (1224, 66290), (1260, 64396), (1360, 59661), (1428, 56820), (1530, 53032), (1680, 48297), (1785, 45456), (1894, 42840), (1904, 42615), (2040, 39774), (2142, 37880), (2380, 34092), (2448, 33145), (2520, 32198), (2841, 28560), (2856, 28410), (3060, 26516), (3570, 22728), (3788, 21420), (4080, 19887), (4284, 18940), (4735, 17136), (4760, 17046), (5040, 16099), (5355, 15152), (5682, 14280), (5712, 14205), (6120, 13258), (6629, 12240), (7140, 11364), (7576, 10710), (8523, 9520), (8568, 9470)]