256631440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1$

素因数の和:249

約数の個数: 160

約数和(自身を含む): 679956480

約数和(自身を除く): 423325040

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 40, 52, 58, 65, 67, 80, 104, 116, 127, 130, 134, 145, 208, 232, 254, 260, 268, 290, 335, 377, 464, 508, 520, 536, 580, 635, 670, 754, 871, 1016, 1040, 1072, 1160, 1270, 1340, 1508, 1651, 1742, 1885, 1943, 2032, 2320, 2540, 2680, 3016, 3302, 3484, 3683, 3770, 3886, 4355, 5080, 5360, 6032, 6604, 6968, 7366, 7540, 7772, 8255, 8509, 8710, 9715, 10160, 13208, 13936, 14732, 15080, 15544, 16510, 17018, 17420, 18415, 19430, 25259, 26416, 29464, 30160, 31088, 33020, 34036, 34840, 36830, 38860, 42545, 47879, 50518, 58928, 66040, 68072, 69680, 73660, 77720, 85090, 95758, 101036, 110617, 126295, 132080, 136144, 147320, 155440, 170180, 191516, 202072, 221234, 239395, 246761, 252590, 294640, 340360, 383032, 404144, 442468, 478790, 493522, 505180, 553085, 680720, 766064, 884936, 957580, 987044, 1010360, 1106170, 1233805, 1769872, 1915160, 1974088, 2020720, 2212340, 2467610, 3207893, 3830320, 3948176, 4424680, 4935220, 6415786, 8849360, 9870440, 12831572, 16039465, 19740880, 25663144, 32078930, 51326288, 64157860, 128315720, 256631440]

約数ペア:

[(1, 256631440), (2, 128315720), (4, 64157860), (5, 51326288), (8, 32078930), (10, 25663144), (13, 19740880), (16, 16039465), (20, 12831572), (26, 9870440), (29, 8849360), (40, 6415786), (52, 4935220), (58, 4424680), (65, 3948176), (67, 3830320), (80, 3207893), (104, 2467610), (116, 2212340), (127, 2020720), (130, 1974088), (134, 1915160), (145, 1769872), (208, 1233805), (232, 1106170), (254, 1010360), (260, 987044), (268, 957580), (290, 884936), (335, 766064), (377, 680720), (464, 553085), (508, 505180), (520, 493522), (536, 478790), (580, 442468), (635, 404144), (670, 383032), (754, 340360), (871, 294640), (1016, 252590), (1040, 246761), (1072, 239395), (1160, 221234), (1270, 202072), (1340, 191516), (1508, 170180), (1651, 155440), (1742, 147320), (1885, 136144), (1943, 132080), (2032, 126295), (2320, 110617), (2540, 101036), (2680, 95758), (3016, 85090), (3302, 77720), (3484, 73660), (3683, 69680), (3770, 68072), (3886, 66040), (4355, 58928), (5080, 50518), (5360, 47879), (6032, 42545), (6604, 38860), (6968, 36830), (7366, 34840), (7540, 34036), (7772, 33020), (8255, 31088), (8509, 30160), (8710, 29464), (9715, 26416), (10160, 25259), (13208, 19430), (13936, 18415), (14732, 17420), (15080, 17018), (15544, 16510)]