128245760

素因数分解:

$2^{13}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:163

約数の個数: 112

約数和(自身を含む): 320844672

約数和(自身を除く): 192598912

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, 19840, 20480, 25048, 25856, 31310, 31744, 32320, 39680, 40960, 50096, 51712, 62620, 63488, 64640, 79360, 100192, 103424, 125240, 126976, 129280, 158720, 200384, 206848, 250480, 253952, 258560, 317440, 400768, 413696, 500960, 517120, 634880, 801536, 827392, 1001920, 1034240, 1269760, 1603072, 2003840, 2068480, 3206144, 4007680, 4136960, 6412288, 8015360, 12824576, 16030720, 25649152, 32061440, 64122880, 128245760]

約数ペア:

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