256565920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1$

素因数の和:255

約数の個数: 192

約数和(自身を含む): 707180544

約数和(自身を除く): 450614624

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 31, 32, 40, 46, 52, 62, 65, 80, 92, 104, 115, 124, 130, 155, 160, 173, 184, 208, 230, 248, 260, 299, 310, 346, 368, 403, 416, 460, 496, 520, 598, 620, 692, 713, 736, 806, 865, 920, 992, 1040, 1196, 1240, 1384, 1426, 1495, 1612, 1730, 1840, 2015, 2080, 2249, 2392, 2480, 2768, 2852, 2990, 3224, 3460, 3565, 3680, 3979, 4030, 4498, 4784, 4960, 5363, 5536, 5704, 5980, 6448, 6920, 7130, 7958, 8060, 8996, 9269, 9568, 10726, 11245, 11408, 11960, 12896, 13840, 14260, 15916, 16120, 17992, 18538, 19895, 21452, 22490, 22816, 23920, 26815, 27680, 28520, 31832, 32240, 35984, 37076, 39790, 42904, 44980, 46345, 47840, 51727, 53630, 57040, 63664, 64480, 69719, 71968, 74152, 79580, 85808, 89960, 92690, 103454, 107260, 114080, 123349, 127328, 139438, 148304, 159160, 171616, 179920, 185380, 206908, 214520, 246698, 258635, 278876, 296608, 318320, 348595, 359840, 370760, 413816, 429040, 493396, 517270, 557752, 616745, 636640, 697190, 741520, 827632, 858080, 986792, 1034540, 1115504, 1233490, 1394380, 1483040, 1603537, 1655264, 1973584, 2069080, 2231008, 2466980, 2788760, 3207074, 3947168, 4138160, 4933960, 5577520, 6414148, 8017685, 8276320, 9867920, 11155040, 12828296, 16035370, 19735840, 25656592, 32070740, 51313184, 64141480, 128282960, 256565920]

約数ペア:

[(1, 256565920), (2, 128282960), (4, 64141480), (5, 51313184), (8, 32070740), (10, 25656592), (13, 19735840), (16, 16035370), (20, 12828296), (23, 11155040), (26, 9867920), (31, 8276320), (32, 8017685), (40, 6414148), (46, 5577520), (52, 4933960), (62, 4138160), (65, 3947168), (80, 3207074), (92, 2788760), (104, 2466980), (115, 2231008), (124, 2069080), (130, 1973584), (155, 1655264), (160, 1603537), (173, 1483040), (184, 1394380), (208, 1233490), (230, 1115504), (248, 1034540), (260, 986792), (299, 858080), (310, 827632), (346, 741520), (368, 697190), (403, 636640), (416, 616745), (460, 557752), (496, 517270), (520, 493396), (598, 429040), (620, 413816), (692, 370760), (713, 359840), (736, 348595), (806, 318320), (865, 296608), (920, 278876), (992, 258635), (1040, 246698), (1196, 214520), (1240, 206908), (1384, 185380), (1426, 179920), (1495, 171616), (1612, 159160), (1730, 148304), (1840, 139438), (2015, 127328), (2080, 123349), (2249, 114080), (2392, 107260), (2480, 103454), (2768, 92690), (2852, 89960), (2990, 85808), (3224, 79580), (3460, 74152), (3565, 71968), (3680, 69719), (3979, 64480), (4030, 63664), (4498, 57040), (4784, 53630), (4960, 51727), (5363, 47840), (5536, 46345), (5704, 44980), (5980, 42904), (6448, 39790), (6920, 37076), (7130, 35984), (7958, 32240), (8060, 31832), (8996, 28520), (9269, 27680), (9568, 26815), (10726, 23920), (11245, 22816), (11408, 22490), (11960, 21452), (12896, 19895), (13840, 18538), (14260, 17992), (15916, 16120)]