28439620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{503}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 65536128

約数和(自身を除く): 37096508

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 257, 503, 514, 1006, 1028, 1285, 2012, 2515, 2570, 2827, 5030, 5140, 5533, 5654, 10060, 11066, 11308, 14135, 22132, 27665, 28270, 55330, 56540, 110660, 129271, 258542, 517084, 646355, 1292710, 1421981, 2585420, 2843962, 5687924, 7109905, 14219810, 28439620]

約数ペア:

[(1, 28439620), (2, 14219810), (4, 7109905), (5, 5687924), (10, 2843962), (11, 2585420), (20, 1421981), (22, 1292710), (44, 646355), (55, 517084), (110, 258542), (220, 129271), (257, 110660), (503, 56540), (514, 55330), (1006, 28270), (1028, 27665), (1285, 22132), (2012, 14135), (2515, 11308), (2570, 11066), (2827, 10060), (5030, 5654), (5140, 5533)]