81215880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:411

約数の個数: 128

約数和(自身を含む): 259200000

約数和(自身を除く): 177984120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 76, 95, 114, 120, 152, 179, 190, 199, 228, 285, 358, 380, 398, 456, 537, 570, 597, 716, 760, 796, 895, 995, 1074, 1140, 1194, 1432, 1592, 1790, 1990, 2148, 2280, 2388, 2685, 2985, 3401, 3580, 3781, 3980, 4296, 4776, 5370, 5970, 6802, 7160, 7562, 7960, 10203, 10740, 11343, 11940, 13604, 15124, 17005, 18905, 20406, 21480, 22686, 23880, 27208, 30248, 34010, 35621, 37810, 40812, 45372, 51015, 56715, 68020, 71242, 75620, 81624, 90744, 102030, 106863, 113430, 136040, 142484, 151240, 178105, 204060, 213726, 226860, 284968, 356210, 408120, 427452, 453720, 534315, 676799, 712420, 854904, 1068630, 1353598, 1424840, 2030397, 2137260, 2707196, 3383995, 4060794, 4274520, 5414392, 6767990, 8121588, 10151985, 13535980, 16243176, 20303970, 27071960, 40607940, 81215880]

約数ペア:

[(1, 81215880), (2, 40607940), (3, 27071960), (4, 20303970), (5, 16243176), (6, 13535980), (8, 10151985), (10, 8121588), (12, 6767990), (15, 5414392), (19, 4274520), (20, 4060794), (24, 3383995), (30, 2707196), (38, 2137260), (40, 2030397), (57, 1424840), (60, 1353598), (76, 1068630), (95, 854904), (114, 712420), (120, 676799), (152, 534315), (179, 453720), (190, 427452), (199, 408120), (228, 356210), (285, 284968), (358, 226860), (380, 213726), (398, 204060), (456, 178105), (537, 151240), (570, 142484), (597, 136040), (716, 113430), (760, 106863), (796, 102030), (895, 90744), (995, 81624), (1074, 75620), (1140, 71242), (1194, 68020), (1432, 56715), (1592, 51015), (1790, 45372), (1990, 40812), (2148, 37810), (2280, 35621), (2388, 34010), (2685, 30248), (2985, 27208), (3401, 23880), (3580, 22686), (3781, 21480), (3980, 20406), (4296, 18905), (4776, 17005), (5370, 15124), (5970, 13604), (6802, 11940), (7160, 11343), (7562, 10740), (7960, 10203)]