257681920

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:262

約数の個数: 160

約数和(自身を含む): 678813696

約数和(自身を除く): 421131776

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 64, 68, 80, 85, 124, 128, 136, 155, 160, 170, 191, 248, 256, 272, 310, 320, 340, 382, 496, 512, 527, 544, 620, 640, 680, 764, 955, 992, 1054, 1088, 1240, 1280, 1360, 1528, 1910, 1984, 2108, 2176, 2480, 2560, 2635, 2720, 3056, 3247, 3820, 3968, 4216, 4352, 4960, 5270, 5440, 5921, 6112, 6494, 7640, 7936, 8432, 8704, 9920, 10540, 10880, 11842, 12224, 12988, 15280, 15872, 16235, 16864, 19840, 21080, 21760, 23684, 24448, 25976, 29605, 30560, 32470, 33728, 39680, 42160, 43520, 47368, 48896, 51952, 59210, 61120, 64940, 67456, 79360, 84320, 94736, 97792, 100657, 103904, 118420, 122240, 129880, 134912, 168640, 189472, 201314, 207808, 236840, 244480, 259760, 269824, 337280, 378944, 402628, 415616, 473680, 488960, 503285, 519520, 674560, 757888, 805256, 831232, 947360, 1006570, 1039040, 1349120, 1515776, 1610512, 1662464, 1894720, 2013140, 2078080, 3031552, 3221024, 3789440, 4026280, 4156160, 6442048, 7578880, 8052560, 8312320, 12884096, 15157760, 16105120, 25768192, 32210240, 51536384, 64420480, 128840960, 257681920]

約数ペア:

[(1, 257681920), (2, 128840960), (4, 64420480), (5, 51536384), (8, 32210240), (10, 25768192), (16, 16105120), (17, 15157760), (20, 12884096), (31, 8312320), (32, 8052560), (34, 7578880), (40, 6442048), (62, 4156160), (64, 4026280), (68, 3789440), (80, 3221024), (85, 3031552), (124, 2078080), (128, 2013140), (136, 1894720), (155, 1662464), (160, 1610512), (170, 1515776), (191, 1349120), (248, 1039040), (256, 1006570), (272, 947360), (310, 831232), (320, 805256), (340, 757888), (382, 674560), (496, 519520), (512, 503285), (527, 488960), (544, 473680), (620, 415616), (640, 402628), (680, 378944), (764, 337280), (955, 269824), (992, 259760), (1054, 244480), (1088, 236840), (1240, 207808), (1280, 201314), (1360, 189472), (1528, 168640), (1910, 134912), (1984, 129880), (2108, 122240), (2176, 118420), (2480, 103904), (2560, 100657), (2635, 97792), (2720, 94736), (3056, 84320), (3247, 79360), (3820, 67456), (3968, 64940), (4216, 61120), (4352, 59210), (4960, 51952), (5270, 48896), (5440, 47368), (5921, 43520), (6112, 42160), (6494, 39680), (7640, 33728), (7936, 32470), (8432, 30560), (8704, 29605), (9920, 25976), (10540, 24448), (10880, 23684), (11842, 21760), (12224, 21080), (12988, 19840), (15280, 16864), (15872, 16235)]