648688640

素因数分解:

$2^{10}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:184

約数の個数: 176

約数和(自身を含む): 1656989184

約数和(自身を除く): 1008300544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 61, 62, 64, 67, 80, 122, 124, 128, 134, 155, 160, 244, 248, 256, 268, 305, 310, 320, 335, 488, 496, 512, 536, 610, 620, 640, 670, 976, 992, 1024, 1072, 1220, 1240, 1280, 1340, 1891, 1952, 1984, 2077, 2144, 2440, 2480, 2560, 2680, 3782, 3904, 3968, 4087, 4154, 4288, 4880, 4960, 5120, 5360, 7564, 7808, 7936, 8174, 8308, 8576, 9455, 9760, 9920, 10385, 10720, 15128, 15616, 15872, 16348, 16616, 17152, 18910, 19520, 19840, 20435, 20770, 21440, 30256, 31232, 31744, 32696, 33232, 34304, 37820, 39040, 39680, 40870, 41540, 42880, 60512, 62464, 65392, 66464, 68608, 75640, 78080, 79360, 81740, 83080, 85760, 121024, 126697, 130784, 132928, 151280, 156160, 158720, 163480, 166160, 171520, 242048, 253394, 261568, 265856, 302560, 312320, 326960, 332320, 343040, 484096, 506788, 523136, 531712, 605120, 633485, 653920, 664640, 968192, 1013576, 1046272, 1063424, 1210240, 1266970, 1307840, 1329280, 1936384, 2027152, 2092544, 2126848, 2420480, 2533940, 2615680, 2658560, 4054304, 4185088, 4840960, 5067880, 5231360, 5317120, 8108608, 9681920, 10135760, 10462720, 10634240, 16217216, 20271520, 20925440, 32434432, 40543040, 64868864, 81086080, 129737728, 162172160, 324344320, 648688640]

約数ペア:

[(1, 648688640), (2, 324344320), (4, 162172160), (5, 129737728), (8, 81086080), (10, 64868864), (16, 40543040), (20, 32434432), (31, 20925440), (32, 20271520), (40, 16217216), (61, 10634240), (62, 10462720), (64, 10135760), (67, 9681920), (80, 8108608), (122, 5317120), (124, 5231360), (128, 5067880), (134, 4840960), (155, 4185088), (160, 4054304), (244, 2658560), (248, 2615680), (256, 2533940), (268, 2420480), (305, 2126848), (310, 2092544), (320, 2027152), (335, 1936384), (488, 1329280), (496, 1307840), (512, 1266970), (536, 1210240), (610, 1063424), (620, 1046272), (640, 1013576), (670, 968192), (976, 664640), (992, 653920), (1024, 633485), (1072, 605120), (1220, 531712), (1240, 523136), (1280, 506788), (1340, 484096), (1891, 343040), (1952, 332320), (1984, 326960), (2077, 312320), (2144, 302560), (2440, 265856), (2480, 261568), (2560, 253394), (2680, 242048), (3782, 171520), (3904, 166160), (3968, 163480), (4087, 158720), (4154, 156160), (4288, 151280), (4880, 132928), (4960, 130784), (5120, 126697), (5360, 121024), (7564, 85760), (7808, 83080), (7936, 81740), (8174, 79360), (8308, 78080), (8576, 75640), (9455, 68608), (9760, 66464), (9920, 65392), (10385, 62464), (10720, 60512), (15128, 42880), (15616, 41540), (15872, 40870), (16348, 39680), (16616, 39040), (17152, 37820), (18910, 34304), (19520, 33232), (19840, 32696), (20435, 31744), (20770, 31232), (21440, 30256)]