28053520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:544

約数の個数: 80

約数和(自身を含む): 72316800

約数和(自身を除く): 44263280

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 71, 80, 88, 110, 142, 176, 220, 284, 355, 440, 449, 568, 710, 781, 880, 898, 1136, 1420, 1562, 1796, 2245, 2840, 3124, 3592, 3905, 4490, 4939, 5680, 6248, 7184, 7810, 8980, 9878, 12496, 15620, 17960, 19756, 24695, 31240, 31879, 35920, 39512, 49390, 62480, 63758, 79024, 98780, 127516, 159395, 197560, 255032, 318790, 350669, 395120, 510064, 637580, 701338, 1275160, 1402676, 1753345, 2550320, 2805352, 3506690, 5610704, 7013380, 14026760, 28053520]

約数ペア:

[(1, 28053520), (2, 14026760), (4, 7013380), (5, 5610704), (8, 3506690), (10, 2805352), (11, 2550320), (16, 1753345), (20, 1402676), (22, 1275160), (40, 701338), (44, 637580), (55, 510064), (71, 395120), (80, 350669), (88, 318790), (110, 255032), (142, 197560), (176, 159395), (220, 127516), (284, 98780), (355, 79024), (440, 63758), (449, 62480), (568, 49390), (710, 39512), (781, 35920), (880, 31879), (898, 31240), (1136, 24695), (1420, 19756), (1562, 17960), (1796, 15620), (2245, 12496), (2840, 9878), (3124, 8980), (3592, 7810), (3905, 7184), (4490, 6248), (4939, 5680)]