256491520

素因数分解:

$2^{14}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:165

約数の個数: 120

約数和(自身を含む): 641708928

約数和(自身を除く): 385217408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 101, 124, 128, 155, 160, 202, 248, 256, 310, 320, 404, 496, 505, 512, 620, 640, 808, 992, 1010, 1024, 1240, 1280, 1616, 1984, 2020, 2048, 2480, 2560, 3131, 3232, 3968, 4040, 4096, 4960, 5120, 6262, 6464, 7936, 8080, 8192, 9920, 10240, 12524, 12928, 15655, 15872, 16160, 16384, 19840, 20480, 25048, 25856, 31310, 31744, 32320, 39680, 40960, 50096, 51712, 62620, 63488, 64640, 79360, 81920, 100192, 103424, 125240, 126976, 129280, 158720, 200384, 206848, 250480, 253952, 258560, 317440, 400768, 413696, 500960, 507904, 517120, 634880, 801536, 827392, 1001920, 1034240, 1269760, 1603072, 1654784, 2003840, 2068480, 2539520, 3206144, 4007680, 4136960, 6412288, 8015360, 8273920, 12824576, 16030720, 25649152, 32061440, 51298304, 64122880, 128245760, 256491520]

約数ペア:

[(1, 256491520), (2, 128245760), (4, 64122880), (5, 51298304), (8, 32061440), (10, 25649152), (16, 16030720), (20, 12824576), (31, 8273920), (32, 8015360), (40, 6412288), (62, 4136960), (64, 4007680), (80, 3206144), (101, 2539520), (124, 2068480), (128, 2003840), (155, 1654784), (160, 1603072), (202, 1269760), (248, 1034240), (256, 1001920), (310, 827392), (320, 801536), (404, 634880), (496, 517120), (505, 507904), (512, 500960), (620, 413696), (640, 400768), (808, 317440), (992, 258560), (1010, 253952), (1024, 250480), (1240, 206848), (1280, 200384), (1616, 158720), (1984, 129280), (2020, 126976), (2048, 125240), (2480, 103424), (2560, 100192), (3131, 81920), (3232, 79360), (3968, 64640), (4040, 63488), (4096, 62620), (4960, 51712), (5120, 50096), (6262, 40960), (6464, 39680), (7936, 32320), (8080, 31744), (8192, 31310), (9920, 25856), (10240, 25048), (12524, 20480), (12928, 19840), (15655, 16384), (15872, 16160)]