1640961920

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{1553}}^1$

素因数の和:1712

約数の個数: 128

約数和(自身を含む): 4260695040

約数和(自身を除く): 2619733120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 127, 128, 130, 160, 208, 254, 260, 320, 416, 508, 520, 635, 640, 832, 1016, 1040, 1270, 1553, 1651, 1664, 2032, 2080, 2540, 3106, 3302, 4064, 4160, 5080, 6212, 6604, 7765, 8128, 8255, 8320, 10160, 12424, 13208, 15530, 16256, 16510, 20189, 20320, 24848, 26416, 31060, 33020, 40378, 40640, 49696, 52832, 62120, 66040, 80756, 81280, 99392, 100945, 105664, 124240, 132080, 161512, 197231, 198784, 201890, 211328, 248480, 264160, 323024, 394462, 403780, 496960, 528320, 646048, 788924, 807560, 986155, 993920, 1056640, 1292096, 1577848, 1615120, 1972310, 2564003, 2584192, 3155696, 3230240, 3944620, 5128006, 6311392, 6460480, 7889240, 10256012, 12622784, 12820015, 12920960, 15778480, 20512024, 25245568, 25640030, 31556960, 41024048, 51280060, 63113920, 82048096, 102560120, 126227840, 164096192, 205120240, 328192384, 410240480, 820480960, 1640961920]

約数ペア:

[(1, 1640961920), (2, 820480960), (4, 410240480), (5, 328192384), (8, 205120240), (10, 164096192), (13, 126227840), (16, 102560120), (20, 82048096), (26, 63113920), (32, 51280060), (40, 41024048), (52, 31556960), (64, 25640030), (65, 25245568), (80, 20512024), (104, 15778480), (127, 12920960), (128, 12820015), (130, 12622784), (160, 10256012), (208, 7889240), (254, 6460480), (260, 6311392), (320, 5128006), (416, 3944620), (508, 3230240), (520, 3155696), (635, 2584192), (640, 2564003), (832, 1972310), (1016, 1615120), (1040, 1577848), (1270, 1292096), (1553, 1056640), (1651, 993920), (1664, 986155), (2032, 807560), (2080, 788924), (2540, 646048), (3106, 528320), (3302, 496960), (4064, 403780), (4160, 394462), (5080, 323024), (6212, 264160), (6604, 248480), (7765, 211328), (8128, 201890), (8255, 198784), (8320, 197231), (10160, 161512), (12424, 132080), (13208, 124240), (15530, 105664), (16256, 100945), (16510, 99392), (20189, 81280), (20320, 80756), (24848, 66040), (26416, 62120), (31060, 52832), (33020, 49696), (40378, 40640)]